CVE-2025-1936

moderate-risk
Published 2025-03-04

jar: URLs retrieve local file content packaged in a ZIP archive. The null and everything after it was ignored when retrieving the content from the archive, but the fake extension after the null was used to determine the type of content. This could have been used to hide code in a web extension disguised as something else like an image. This vulnerability was fixed in Firefox 136, Firefox ESR 128.8, Thunderbird 136, and Thunderbird 128.8.

Do I need to act?

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0.15% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.3/10 High
NETWORK / LOW complexity

Affected Products (3)

Affected Vendors

Mozilla

References (6)

Permissions Required https://bugzilla.mozilla.org/show_bug.cgi?id=1940027
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2025-14/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2025-16/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2025-17/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2025-18/
https://lists.debian.org/debian-lts-announce/2025/03/msg00006.html
36
/ 100
moderate-risk
Severity 26/34 · High
Exploitability 1/34 · Minimal
Exposure 9/34 · Low