CVE-2022-29916
MEDIUMFirefox < 100.0 and Firefox ESR < 91.9 - Browser History Probing via CSS Variable Resource Loading
Title source: llmDescription
Firefox behaved slightly differently for already known resources when loading CSS resources involving CSS variables. This could have been used to probe the browser history. This vulnerability affects Thunderbird < 91.9, Firefox ESR < 91.9, and Firefox < 100.
References (4)
Core 4
Core References
Exploit, Issue Tracking, Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1760674
Exploit, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2022-16/
Exploit, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2022-17/
Exploit, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2022-18/
Scores
CVSS v3
6.5
EPSS
0.0025
EPSS Percentile
47.8%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-200
Status
published
Products (3)
mozilla/firefox
< 100.0
mozilla/firefox_esr
< 91.9
mozilla/thunderbird
< 91.9
Published
Dec 22, 2022
Tracked Since
Feb 18, 2026