CVE-2020-15676
MEDIUMFirefox < 81.0, Firefox ESR < 78.3, Thunderbird < 78.3 - Cross-Site Scripting via SVG onload Handler
Title source: llmDescription
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. This vulnerability affects Firefox < 81, Thunderbird < 78.3, and Firefox ESR < 78.3.
References (9)
Core 9
Core References
Release Notes, Vendor Advisory x_refsource_misc
https://www.mozilla.org/security/advisories/mfsa2020-43/
Release Notes, Vendor Advisory x_refsource_misc
https://www.mozilla.org/security/advisories/mfsa2020-44/
Release Notes, Vendor Advisory x_refsource_misc
https://www.mozilla.org/security/advisories/mfsa2020-42/
Issue Tracking, Permissions Required, Vendor Advisory x_refsource_misc
https://bugzilla.mozilla.org/show_bug.cgi?id=1646140
Third Party Advisory vendor-advisory
x_refsource_debian
https://www.debian.org/security/2020/dsa-4770
Mailing List, Third Party Advisory mailing-list
x_refsource_mlist
https://lists.debian.org/debian-lts-announce/2020/10/msg00020.html
Third Party Advisory vendor-advisory
x_refsource_gentoo
https://security.gentoo.org/glsa/202010-02
Broken Link, Mailing List, Third Party Advisory vendor-advisory
x_refsource_suse
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00074.html
Broken Link, Mailing List, Third Party Advisory vendor-advisory
x_refsource_suse
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00077.html
Scores
CVSS v3
6.1
EPSS
0.0100
EPSS Percentile
77.2%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Details
CWE
CWE-79
Status
published
Products (7)
debian/debian_linux
9.0
debian/debian_linux
10.0
mozilla/firefox
< 81.0
mozilla/firefox_esr
< 78.3
mozilla/thunderbird
< 78.3
opensuse/leap
15.1
opensuse/leap
15.2
Published
Oct 01, 2020
Tracked Since
Feb 18, 2026