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Vulnerability details: VCID-y7ya-bf6z-g3bn
Vulnerability ID VCID-y7ya-bf6z-g3bn
Aliases CVE-2018-1000078
GHSA-87qx-g5wg-mwmj
Summary RubyGems version Ruby 2.2 series: 2.2.9 and earlier, Ruby 2.3 series: 2.3.6 and earlier, Ruby 2.4 series: 2.4.3 and earlier, Ruby 2.5 series: 2.5.0 and earlier, prior to trunk revision 62422 contains a Cross Site Scripting (XSS) vulnerability in gem server display of homepage attribute that can result in XSS. This attack appear to be exploitable via the victim must browse to a malicious gem on a vulnerable gem server. This vulnerability appears to have been fixed in 2.7.6.
Status Published
Exploitability 0.5
Weighted Severity 6.2
Risk 3.1
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
cvssv3.1 6.1 http://blog.rubygems.org/2018/02/15/2.7.6-released.html
generic_textual MODERATE http://blog.rubygems.org/2018/02/15/2.7.6-released.html
cvssv3.1 6.1 http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00036.html
generic_textual MODERATE http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00036.html
cvssv3.1 6.1 https://access.redhat.com/errata/RHSA-2018:3729
generic_textual MODERATE https://access.redhat.com/errata/RHSA-2018:3729
cvssv3.1 6.1 https://access.redhat.com/errata/RHSA-2018:3730
generic_textual MODERATE https://access.redhat.com/errata/RHSA-2018:3730
cvssv3.1 6.1 https://access.redhat.com/errata/RHSA-2018:3731
generic_textual MODERATE https://access.redhat.com/errata/RHSA-2018:3731
cvssv3.1 6.1 https://access.redhat.com/errata/RHSA-2019:2028
generic_textual MODERATE https://access.redhat.com/errata/RHSA-2019:2028
cvssv3.1 6.1 https://access.redhat.com/errata/RHSA-2020:0542
generic_textual MODERATE https://access.redhat.com/errata/RHSA-2020:0542
cvssv3.1 6.1 https://access.redhat.com/errata/RHSA-2020:0591
generic_textual MODERATE https://access.redhat.com/errata/RHSA-2020:0591
cvssv3.1 6.1 https://access.redhat.com/errata/RHSA-2020:0663
generic_textual MODERATE https://access.redhat.com/errata/RHSA-2020:0663
cvssv3 6.1 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-1000078.json
epss 0.00763 https://api.first.org/data/v1/epss?cve=CVE-2018-1000078
epss 0.00763 https://api.first.org/data/v1/epss?cve=CVE-2018-1000078
epss 0.00763 https://api.first.org/data/v1/epss?cve=CVE-2018-1000078
epss 0.00763 https://api.first.org/data/v1/epss?cve=CVE-2018-1000078
epss 0.00763 https://api.first.org/data/v1/epss?cve=CVE-2018-1000078
epss 0.00763 https://api.first.org/data/v1/epss?cve=CVE-2018-1000078
epss 0.00763 https://api.first.org/data/v1/epss?cve=CVE-2018-1000078
epss 0.00763 https://api.first.org/data/v1/epss?cve=CVE-2018-1000078
epss 0.00763 https://api.first.org/data/v1/epss?cve=CVE-2018-1000078
cvssv3 6.1 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv3.1_qr MODERATE https://github.com/advisories/GHSA-87qx-g5wg-mwmj
cvssv3.1 6.1 https://github.com/jruby/jruby/commit/0b06b48ab4432237ce5fc1bef47f2c6bcf7843f7
generic_textual MODERATE https://github.com/jruby/jruby/commit/0b06b48ab4432237ce5fc1bef47f2c6bcf7843f7
cvssv3.1 6.1 https://github.com/rubygems/rubygems/commit/5971b486d4dbb2bad5d3445b3801c456eb0ce183
generic_textual MODERATE https://github.com/rubygems/rubygems/commit/5971b486d4dbb2bad5d3445b3801c456eb0ce183
cvssv3 6.1 https://github.com/rubygems/rubygems/commit/66a28b9275551384fdab45f3591a82d6b59952cb
cvssv3.1 6.1 https://github.com/rubygems/rubygems/commit/66a28b9275551384fdab45f3591a82d6b59952cb
generic_textual MODERATE https://github.com/rubygems/rubygems/commit/66a28b9275551384fdab45f3591a82d6b59952cb
cvssv3.1 6.1 https://lists.debian.org/debian-lts-announce/2018/04/msg00000.html
generic_textual MODERATE https://lists.debian.org/debian-lts-announce/2018/04/msg00000.html
cvssv3.1 6.1 https://lists.debian.org/debian-lts-announce/2018/04/msg00001.html
generic_textual MODERATE https://lists.debian.org/debian-lts-announce/2018/04/msg00001.html
cvssv3.1 6.1 https://lists.debian.org/debian-lts-announce/2018/04/msg00023.html
generic_textual MODERATE https://lists.debian.org/debian-lts-announce/2018/04/msg00023.html
cvssv3.1 6.1 https://lists.debian.org/debian-lts-announce/2018/07/msg00012.html
generic_textual MODERATE https://lists.debian.org/debian-lts-announce/2018/07/msg00012.html
cvssv3.1 6.1 https://lists.debian.org/debian-lts-announce/2019/05/msg00028.html
generic_textual MODERATE https://lists.debian.org/debian-lts-announce/2019/05/msg00028.html
cvssv2 4.3 https://nvd.nist.gov/vuln/detail/CVE-2018-1000078
cvssv3 6.1 https://nvd.nist.gov/vuln/detail/CVE-2018-1000078
cvssv3.1 6.1 https://nvd.nist.gov/vuln/detail/CVE-2018-1000078
generic_textual MODERATE https://nvd.nist.gov/vuln/detail/CVE-2018-1000078
cvssv3.1 6.1 https://usn.ubuntu.com/3621-1
generic_textual MODERATE https://usn.ubuntu.com/3621-1
cvssv3.1 6.1 https://www.debian.org/security/2018/dsa-4219
generic_textual MODERATE https://www.debian.org/security/2018/dsa-4219
cvssv3.1 6.1 https://www.debian.org/security/2018/dsa-4259
generic_textual MODERATE https://www.debian.org/security/2018/dsa-4259
Reference id Reference type URL
http://blog.rubygems.org/2018/02/15/2.7.6-released.html
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00036.html
https://access.redhat.com/errata/RHSA-2018:3729
https://access.redhat.com/errata/RHSA-2018:3730
https://access.redhat.com/errata/RHSA-2018:3731
https://access.redhat.com/errata/RHSA-2019:2028
https://access.redhat.com/errata/RHSA-2020:0542
https://access.redhat.com/errata/RHSA-2020:0591
https://access.redhat.com/errata/RHSA-2020:0663
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-1000078.json
https://api.first.org/data/v1/epss?cve=CVE-2018-1000078
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-17405
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-17742
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-17790
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-1000073
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-1000074
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-1000075
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-1000076
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-1000077
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-1000078
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-1000079
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-6914
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-8777
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-8778
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-8779
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-8780
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://github.com/jruby/jruby/commit/0b06b48ab4432237ce5fc1bef47f2c6bcf7843f7
https://github.com/rubygems/rubygems/commit/5971b486d4dbb2bad5d3445b3801c456eb0ce183
https://github.com/rubygems/rubygems/commit/66a28b9275551384fdab45f3591a82d6b59952cb
https://lists.debian.org/debian-lts-announce/2018/04/msg00000.html
https://lists.debian.org/debian-lts-announce/2018/04/msg00001.html
https://lists.debian.org/debian-lts-announce/2018/04/msg00023.html
https://lists.debian.org/debian-lts-announce/2018/07/msg00012.html
https://lists.debian.org/debian-lts-announce/2019/05/msg00028.html
https://nvd.nist.gov/vuln/detail/CVE-2018-1000078
https://usn.ubuntu.com/3621-1
https://www.debian.org/security/2018/dsa-4219
https://www.debian.org/security/2018/dsa-4259
1547425 https://bugzilla.redhat.com/show_bug.cgi?id=1547425
cpe:2.3:a:rubygems:rubygems:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:rubygems:rubygems:*:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*
GHSA-87qx-g5wg-mwmj https://github.com/advisories/GHSA-87qx-g5wg-mwmj
USN-3621-1 https://usn.ubuntu.com/3621-1/
No exploits are available.
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at http://blog.rubygems.org/2018/02/15/2.7.6-released.html
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

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required

unchanged

changed

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none

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Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00036.html
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

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none

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required

unchanged

changed

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Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://access.redhat.com/errata/RHSA-2018:3729
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

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required

unchanged

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Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://access.redhat.com/errata/RHSA-2018:3730
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

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required

unchanged

changed

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Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://access.redhat.com/errata/RHSA-2018:3731
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

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required

unchanged

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none
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://access.redhat.com/errata/RHSA-2019:2028
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

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unchanged

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none
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://access.redhat.com/errata/RHSA-2020:0542
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

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required

unchanged

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Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://access.redhat.com/errata/RHSA-2020:0591
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

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required

unchanged

changed

high

low

none

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low

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none
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://access.redhat.com/errata/RHSA-2020:0663
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

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none
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-1000078.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

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low

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high

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Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

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Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://github.com/jruby/jruby/commit/0b06b48ab4432237ce5fc1bef47f2c6bcf7843f7
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

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unchanged

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high

low

none

high

low

none

high

low

none
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://github.com/rubygems/rubygems/commit/5971b486d4dbb2bad5d3445b3801c456eb0ce183
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://github.com/rubygems/rubygems/commit/66a28b9275551384fdab45f3591a82d6b59952cb
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://lists.debian.org/debian-lts-announce/2018/04/msg00000.html
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://lists.debian.org/debian-lts-announce/2018/04/msg00001.html
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://lists.debian.org/debian-lts-announce/2018/04/msg00023.html
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://lists.debian.org/debian-lts-announce/2018/07/msg00012.html
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://lists.debian.org/debian-lts-announce/2019/05/msg00028.html
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2018-1000078
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2018-1000078
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2018-1000078
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://usn.ubuntu.com/3621-1
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://www.debian.org/security/2018/dsa-4219
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://www.debian.org/security/2018/dsa-4259
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.72338
EPSS Score 0.00763
Published At June 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-01T12:16:42.717746+00:00 Ubuntu USN Importer Import https://usn.ubuntu.com/3621-1/ 36.1.3