CVE-2022-40956
MEDIUMFirefox ESR <102.3, Thunderbird <102.3, Firefox <105 - XSS
Title source: llmDescription
When injecting an HTML base element, some requests would ignore the CSP's base-uri settings and accept the injected element's base instead. This vulnerability affects Firefox ESR < 102.3, Thunderbird < 102.3, and Firefox < 105.
References (4)
Core 4
Core References
Issue Tracking, Permissions Required, Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1770094
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2022-40/
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2022-41/
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2022-42/
Scores
CVSS v3
6.1
EPSS
0.0024
EPSS Percentile
47.6%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-79
Status
published
Products (3)
mozilla/firefox
< 105.0
mozilla/firefox_esr
< 102.3
mozilla/thunderbird
< 102.3
Published
Dec 22, 2022
Tracked Since
Feb 18, 2026