High severity · published Dec 22, 2022
CVE-2022-26387
When installing an add-on, Firefox verified the signature before prompting the user; but while the user was confirming the prompt, the underlying add-on file could have been…
7.5
CVSS
0.7%
EPSS
No
On KEV
Description
When installing an add-on, Firefox verified the signature before prompting the user; but while the user was confirming the prompt, the underlying add-on file could have been modified and Firefox would not have noticed. This vulnerability affects Firefox < 98, Firefox ESR < 91.7, and Thunderbird < 91.7.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
High
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 52% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FI
Firefox · Mozilla
before 98.0 · source: NVD
FE
Firefox Esr · Mozilla
before 91.7 · source: NVD
TH
Thunderbird · Mozilla
before 91.7 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2022-26387
CVE.org
https://www.cve.org/CVERecord?id=CVE-2022-26387
Exploit
https://bugzilla.mozilla.org/show_bug.cgi?id=1752979
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2022-10/
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2022-11/
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2022-12/
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