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Vulnerability details: VCID-f43n-fgru-vqee
Vulnerability ID VCID-f43n-fgru-vqee
Aliases CVE-2018-20677
GHSA-ph58-4vrj-w6hr
Summary bootstrap Cross-site Scripting vulnerability In Bootstrap before 3.4.0, XSS is possible in the affix configuration target property.
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 https://access.redhat.com/errata/RHBA-2019:1076
generic_textual MODERATE https://access.redhat.com/errata/RHBA-2019:1076
cvssv3.1 6.1 https://access.redhat.com/errata/RHBA-2019:1570
generic_textual MODERATE https://access.redhat.com/errata/RHBA-2019:1570
cvssv3.1 6.1 https://access.redhat.com/errata/RHSA-2019:1456
generic_textual MODERATE https://access.redhat.com/errata/RHSA-2019:1456
cvssv3.1 6.1 https://access.redhat.com/errata/RHSA-2019:3023
generic_textual MODERATE https://access.redhat.com/errata/RHSA-2019:3023
cvssv3.1 6.1 https://access.redhat.com/errata/RHSA-2020:0132
generic_textual MODERATE https://access.redhat.com/errata/RHSA-2020:0132
cvssv3.1 6.1 https://access.redhat.com/errata/RHSA-2020:0133
generic_textual MODERATE https://access.redhat.com/errata/RHSA-2020:0133
cvssv3 6.1 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-20677.json
epss 0.14795 https://api.first.org/data/v1/epss?cve=CVE-2018-20677
epss 0.14795 https://api.first.org/data/v1/epss?cve=CVE-2018-20677
cvssv3.1 6.1 https://blog.getbootstrap.com/2018/12/13/bootstrap-3-4-0
generic_textual MODERATE https://blog.getbootstrap.com/2018/12/13/bootstrap-3-4-0
cvssv3 6.1 https://github.com/advisories/GHSA-ph58-4vrj-w6hr
cvssv3.1_qr MODERATE https://github.com/advisories/GHSA-ph58-4vrj-w6hr
cvssv3.1 6.1 https://github.com/rubysec/ruby-advisory-db/blob/master/gems/bootstrap/CVE-2018-20677.yml
generic_textual MODERATE https://github.com/rubysec/ruby-advisory-db/blob/master/gems/bootstrap/CVE-2018-20677.yml
cvssv3.1 6.1 https://github.com/rubysec/ruby-advisory-db/blob/master/gems/bootstrap-sass/CVE-2018-20677.yml
generic_textual MODERATE https://github.com/rubysec/ruby-advisory-db/blob/master/gems/bootstrap-sass/CVE-2018-20677.yml
cvssv3.1 6.1 https://github.com/twbs/bootstrap
generic_textual MODERATE https://github.com/twbs/bootstrap
cvssv3.1 6.1 https://github.com/twbs/bootstrap/commit/2a5ba23ce8f041f3548317acc992ed8a736b609d
generic_textual MODERATE https://github.com/twbs/bootstrap/commit/2a5ba23ce8f041f3548317acc992ed8a736b609d
cvssv3.1 6.1 https://github.com/twbs/bootstrap/issues/27045
generic_textual MODERATE https://github.com/twbs/bootstrap/issues/27045
cvssv3.1 6.1 https://github.com/twbs/bootstrap/issues/27915#issuecomment-452140906
generic_textual MODERATE https://github.com/twbs/bootstrap/issues/27915#issuecomment-452140906
cvssv3.1 6.1 https://github.com/twbs/bootstrap/issues/27915#issuecomment-452196628
generic_textual MODERATE https://github.com/twbs/bootstrap/issues/27915#issuecomment-452196628
cvssv3.1 6.1 https://github.com/twbs/bootstrap/pull/27047
generic_textual MODERATE https://github.com/twbs/bootstrap/pull/27047
cvssv3.1 6.1 https://lists.apache.org/thread.html/52e0e6b5df827ee7f1e68f7cc3babe61af3b2160f5d74a85469b7b0e@%3Cdev.superset.apache.org%3E
generic_textual MODERATE https://lists.apache.org/thread.html/52e0e6b5df827ee7f1e68f7cc3babe61af3b2160f5d74a85469b7b0e@%3Cdev.superset.apache.org%3E
cvssv3.1 6.1 https://lists.apache.org/thread.html/rd0e44e8ef71eeaaa3cf3d1b8b41eb25894372e2995ec908ce7624d26@%3Ccommits.pulsar.apache.org%3E
generic_textual MODERATE https://lists.apache.org/thread.html/rd0e44e8ef71eeaaa3cf3d1b8b41eb25894372e2995ec908ce7624d26@%3Ccommits.pulsar.apache.org%3E
cvssv2 4.3 https://nvd.nist.gov/vuln/detail/CVE-2018-20677
cvssv3 6.1 https://nvd.nist.gov/vuln/detail/CVE-2018-20677
cvssv3.1 6.1 https://nvd.nist.gov/vuln/detail/CVE-2018-20677
generic_textual MODERATE https://nvd.nist.gov/vuln/detail/CVE-2018-20677
Reference id Reference type URL
https://access.redhat.com/errata/RHBA-2019:1076
https://access.redhat.com/errata/RHBA-2019:1570
https://access.redhat.com/errata/RHSA-2019:1456
https://access.redhat.com/errata/RHSA-2019:3023
https://access.redhat.com/errata/RHSA-2020:0132
https://access.redhat.com/errata/RHSA-2020:0133
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-20677.json
https://api.first.org/data/v1/epss?cve=CVE-2018-20677
https://blog.getbootstrap.com/2018/12/13/bootstrap-3-4-0
https://blog.getbootstrap.com/2018/12/13/bootstrap-3-4-0/
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-20677
https://github.com/rubysec/ruby-advisory-db/blob/master/gems/bootstrap/CVE-2018-20677.yml
https://github.com/rubysec/ruby-advisory-db/blob/master/gems/bootstrap-sass/CVE-2018-20677.yml
https://github.com/twbs/bootstrap
https://github.com/twbs/bootstrap/commit/2a5ba23ce8f041f3548317acc992ed8a736b609d
https://github.com/twbs/bootstrap/issues/27045
https://github.com/twbs/bootstrap/issues/27915#issuecomment-452140906
https://github.com/twbs/bootstrap/issues/27915#issuecomment-452196628
https://github.com/twbs/bootstrap/pull/27047
https://lists.apache.org/thread.html/52e0e6b5df827ee7f1e68f7cc3babe61af3b2160f5d74a85469b7b0e@%3Cdev.superset.apache.org%3E
https://lists.apache.org/thread.html/52e0e6b5df827ee7f1e68f7cc3babe61af3b2160f5d74a85469b7b0e%40%3Cdev.superset.apache.org%3E
https://lists.apache.org/thread.html/rd0e44e8ef71eeaaa3cf3d1b8b41eb25894372e2995ec908ce7624d26@%3Ccommits.pulsar.apache.org%3E
https://lists.apache.org/thread.html/rd0e44e8ef71eeaaa3cf3d1b8b41eb25894372e2995ec908ce7624d26%40%3Ccommits.pulsar.apache.org%3E
https://nvd.nist.gov/vuln/detail/CVE-2018-20677
https://www.tenable.com/security/tns-2021-14
1668089 https://bugzilla.redhat.com/show_bug.cgi?id=1668089
cpe:2.3:a:getbootstrap:bootstrap:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:getbootstrap:bootstrap:*:*:*:*:*:*:*:*
GHSA-ph58-4vrj-w6hr https://github.com/advisories/GHSA-ph58-4vrj-w6hr
RHSA-2020:3936 https://access.redhat.com/errata/RHSA-2020:3936
RHSA-2020:4670 https://access.redhat.com/errata/RHSA-2020:4670
RHSA-2020:5571 https://access.redhat.com/errata/RHSA-2020:5571
RHSA-2023:5693 https://access.redhat.com/errata/RHSA-2023:5693
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 https://access.redhat.com/errata/RHBA-2019:1076
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

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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/RHBA-2019:1570
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

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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-2019:1456
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

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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-2019:3023
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

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physical

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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-2020:0132
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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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-2020:0133
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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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/hydra/rest/securitydata/cve/CVE-2018-20677.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

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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://blog.getbootstrap.com/2018/12/13/bootstrap-3-4-0
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://github.com/rubysec/ruby-advisory-db/blob/master/gems/bootstrap/CVE-2018-20677.yml
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

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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/rubysec/ruby-advisory-db/blob/master/gems/bootstrap-sass/CVE-2018-20677.yml
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

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low

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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/twbs/bootstrap
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

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physical

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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/twbs/bootstrap/commit/2a5ba23ce8f041f3548317acc992ed8a736b609d
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

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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 https://github.com/twbs/bootstrap/issues/27045
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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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/twbs/bootstrap/issues/27915#issuecomment-452140906
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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none

required

unchanged

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high

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none

high

low

none

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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://github.com/twbs/bootstrap/issues/27915#issuecomment-452196628
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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high

low

none

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low

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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/twbs/bootstrap/pull/27047
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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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://lists.apache.org/thread.html/52e0e6b5df827ee7f1e68f7cc3babe61af3b2160f5d74a85469b7b0e@%3Cdev.superset.apache.org%3E
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

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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://lists.apache.org/thread.html/rd0e44e8ef71eeaaa3cf3d1b8b41eb25894372e2995ec908ce7624d26@%3Ccommits.pulsar.apache.org%3E
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-2018-20677
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-2018-20677
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-2018-20677
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

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none
Exploit Prediction Scoring System (EPSS)
Percentile 0.94168
EPSS Score 0.14795
Published At June 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-01T12:21:48.994444+00:00 GithubOSV Importer Import https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2019/01/GHSA-ph58-4vrj-w6hr/GHSA-ph58-4vrj-w6hr.json 36.1.3