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Vulnerability details: VCID-gm6g-46eh-13dr
Vulnerability ID VCID-gm6g-46eh-13dr
Aliases CVE-2020-15658
Summary The code for downloading files did not properly take care of special characters, which led to an attacker being able to cut off the file ending at an earlier position, leading to a different file type being downloaded than shown in the dialog.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (2)
CWE-754 Improper Check for Unusual or Exceptional Conditions
CWE-138 Improper Neutralization of Special Elements
System Score Found at
cvssv3 6.5 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-15658.json
epss 0.00522 https://api.first.org/data/v1/epss?cve=CVE-2020-15658
epss 0.00522 https://api.first.org/data/v1/epss?cve=CVE-2020-15658
epss 0.00522 https://api.first.org/data/v1/epss?cve=CVE-2020-15658
epss 0.00522 https://api.first.org/data/v1/epss?cve=CVE-2020-15658
epss 0.00522 https://api.first.org/data/v1/epss?cve=CVE-2020-15658
epss 0.00522 https://api.first.org/data/v1/epss?cve=CVE-2020-15658
epss 0.00522 https://api.first.org/data/v1/epss?cve=CVE-2020-15658
epss 0.00522 https://api.first.org/data/v1/epss?cve=CVE-2020-15658
epss 0.00522 https://api.first.org/data/v1/epss?cve=CVE-2020-15658
epss 0.00522 https://api.first.org/data/v1/epss?cve=CVE-2020-15658
epss 0.00522 https://api.first.org/data/v1/epss?cve=CVE-2020-15658
epss 0.00522 https://api.first.org/data/v1/epss?cve=CVE-2020-15658
epss 0.00522 https://api.first.org/data/v1/epss?cve=CVE-2020-15658
epss 0.00522 https://api.first.org/data/v1/epss?cve=CVE-2020-15658
epss 0.00522 https://api.first.org/data/v1/epss?cve=CVE-2020-15658
epss 0.00522 https://api.first.org/data/v1/epss?cve=CVE-2020-15658
epss 0.00522 https://api.first.org/data/v1/epss?cve=CVE-2020-15658
cvssv3.1 2.5 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv2 4.3 https://nvd.nist.gov/vuln/detail/CVE-2020-15658
cvssv3.1 6.5 https://nvd.nist.gov/vuln/detail/CVE-2020-15658
archlinux High https://security.archlinux.org/AVG-1213
archlinux High https://security.archlinux.org/AVG-1214
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2020-30
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2020-32
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2020-33
Reference id Reference type URL
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00025.html
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-15658.json
https://api.first.org/data/v1/epss?cve=CVE-2020-15658
https://bugzilla.mozilla.org/show_bug.cgi?id=1637745
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://www.mozilla.org/security/advisories/mfsa2020-30/
https://www.mozilla.org/security/advisories/mfsa2020-32/
https://www.mozilla.org/security/advisories/mfsa2020-33/
1861647 https://bugzilla.redhat.com/show_bug.cgi?id=1861647
AVG-1213 https://security.archlinux.org/AVG-1213
AVG-1214 https://security.archlinux.org/AVG-1214
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*
CVE-2020-15658 https://nvd.nist.gov/vuln/detail/CVE-2020-15658
mfsa2020-30 https://www.mozilla.org/en-US/security/advisories/mfsa2020-30
mfsa2020-32 https://www.mozilla.org/en-US/security/advisories/mfsa2020-32
mfsa2020-33 https://www.mozilla.org/en-US/security/advisories/mfsa2020-33
RHSA-2020:3555 https://access.redhat.com/errata/RHSA-2020:3555
RHSA-2020:3557 https://access.redhat.com/errata/RHSA-2020:3557
RHSA-2020:3559 https://access.redhat.com/errata/RHSA-2020:3559
RHSA-2020:4080 https://access.redhat.com/errata/RHSA-2020:4080
USN-4443-1 https://usn.ubuntu.com/4443-1/
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-15658.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

high

low

none

high

low

none
Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/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

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-2020-15658
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:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2020-15658
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 0.6591
EPSS Score 0.00522
Published At Aug. 16, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:09:41.201365+00:00 Mozilla Importer Import https://github.com/mozilla/foundation-security-advisories/blob/master/announce/2020/mfsa2020-33.yml 37.0.0