CVE-2025-1936 (GCVE-0-2025-1936)

Vulnerability from cvelistv5 – Published: 2025-03-04 13:31 – Updated: 2025-11-03 20:57
VLAI?
Summary
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 affects Firefox < 136, Firefox ESR < 128.8, Thunderbird < 136, and Thunderbird < 128.8.
Severity ?
7.3 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
CWE
  • Adding %00 and a fake extension to a jar: URL changed the interpretation of the contents
Assigner
References
Impacted products
Vendor Product Version
Mozilla Firefox Affected: unspecified , < 136 (custom)
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    Mozilla Firefox ESR Affected: unspecified , < 128.8 (custom)
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    Mozilla Thunderbird Affected: unspecified , < 136 (custom)
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    Mozilla Thunderbird Affected: unspecified , < 128.8 (custom)
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Credits
Surya Dev Singh
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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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