Medium severity · published Dec 22, 2022
CVE-2022-29916
Firefox behaved slightly differently for already known resources when loading CSS resources involving CSS variables
6.5
CVSS
0.8%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.8% · higher than 55% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FI
Firefox · Mozilla
before 100.0 · source: NVD
FE
Firefox Esr · Mozilla
before 91.9 · source: NVD
TH
Thunderbird · Mozilla
before 91.9 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2022-29916
CVE.org
https://www.cve.org/CVERecord?id=CVE-2022-29916
Exploit
https://bugzilla.mozilla.org/show_bug.cgi?id=1760674
Exploit
https://www.mozilla.org/security/advisories/mfsa2022-16/
Exploit
https://www.mozilla.org/security/advisories/mfsa2022-17/
Exploit
https://www.mozilla.org/security/advisories/mfsa2022-18/
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