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Vulnerability details: VCID-cu9t-zetj-4udj
Vulnerability ID VCID-cu9t-zetj-4udj
Aliases CVE-2020-15676
Summary Firefox sometimes ran the onload handler for SVG elements that the DOM sanitizer decided to remove, resulting in JavaScript being executed after pasting attacker-controlled data into a contenteditable element.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
System Score Found at
cvssv3 6.1 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-15676.json
epss 0.01265 https://api.first.org/data/v1/epss?cve=CVE-2020-15676
epss 0.01265 https://api.first.org/data/v1/epss?cve=CVE-2020-15676
epss 0.01265 https://api.first.org/data/v1/epss?cve=CVE-2020-15676
epss 0.01265 https://api.first.org/data/v1/epss?cve=CVE-2020-15676
epss 0.01265 https://api.first.org/data/v1/epss?cve=CVE-2020-15676
epss 0.01265 https://api.first.org/data/v1/epss?cve=CVE-2020-15676
epss 0.01265 https://api.first.org/data/v1/epss?cve=CVE-2020-15676
epss 0.01265 https://api.first.org/data/v1/epss?cve=CVE-2020-15676
epss 0.01265 https://api.first.org/data/v1/epss?cve=CVE-2020-15676
epss 0.01265 https://api.first.org/data/v1/epss?cve=CVE-2020-15676
epss 0.01265 https://api.first.org/data/v1/epss?cve=CVE-2020-15676
epss 0.01265 https://api.first.org/data/v1/epss?cve=CVE-2020-15676
epss 0.01265 https://api.first.org/data/v1/epss?cve=CVE-2020-15676
cvssv2 4.3 https://nvd.nist.gov/vuln/detail/CVE-2020-15676
cvssv3.1 6.1 https://nvd.nist.gov/vuln/detail/CVE-2020-15676
archlinux High https://security.archlinux.org/AVG-1235
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2020-42
generic_textual none https://www.mozilla.org/en-US/security/advisories/mfsa2020-43
generic_textual none https://www.mozilla.org/en-US/security/advisories/mfsa2020-44
Reference id Reference type URL
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00074.html
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00077.html
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-15676.json
https://api.first.org/data/v1/epss?cve=CVE-2020-15676
https://bugzilla.mozilla.org/show_bug.cgi?id=1646140
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15673
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15676
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15677
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15678
https://lists.debian.org/debian-lts-announce/2020/10/msg00020.html
https://security.gentoo.org/glsa/202010-02
https://www.debian.org/security/2020/dsa-4770
https://www.mozilla.org/security/advisories/mfsa2020-42/
https://www.mozilla.org/security/advisories/mfsa2020-43/
https://www.mozilla.org/security/advisories/mfsa2020-44/
1881665 https://bugzilla.redhat.com/show_bug.cgi?id=1881665
ASA-202009-10 https://security.archlinux.org/ASA-202009-10
AVG-1235 https://security.archlinux.org/AVG-1235
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:debian:debian_linux:10.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*
cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:*
CVE-2020-15676 https://nvd.nist.gov/vuln/detail/CVE-2020-15676
mfsa2020-42 https://www.mozilla.org/en-US/security/advisories/mfsa2020-42
mfsa2020-43 https://www.mozilla.org/en-US/security/advisories/mfsa2020-43
mfsa2020-44 https://www.mozilla.org/en-US/security/advisories/mfsa2020-44
RHSA-2020:3832 https://access.redhat.com/errata/RHSA-2020:3832
RHSA-2020:3833 https://access.redhat.com/errata/RHSA-2020:3833
RHSA-2020:3834 https://access.redhat.com/errata/RHSA-2020:3834
RHSA-2020:3835 https://access.redhat.com/errata/RHSA-2020:3835
RHSA-2020:4080 https://access.redhat.com/errata/RHSA-2020:4080
RHSA-2020:4155 https://access.redhat.com/errata/RHSA-2020:4155
RHSA-2020:4156 https://access.redhat.com/errata/RHSA-2020:4156
RHSA-2020:4157 https://access.redhat.com/errata/RHSA-2020:4157
RHSA-2020:4158 https://access.redhat.com/errata/RHSA-2020:4158
RHSA-2020:4163 https://access.redhat.com/errata/RHSA-2020:4163
USN-4546-1 https://usn.ubuntu.com/4546-1/
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 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-15676.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: AV:N/AC:M/Au:N/C:N/I:P/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2020-15676
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:C/C:L/I:L/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2020-15676
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 0.78608
EPSS Score 0.01265
Published At July 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:09:39.382218+00:00 Mozilla Importer Import https://github.com/mozilla/foundation-security-advisories/blob/master/announce/2020/mfsa2020-43.yml 37.0.0