CVE-2025-1936
firefox: Adding %00 and a fake extension to a jar: URL changed the interpretation of the contents
Severity
LowRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · March 4, 2025
Updated · March 26, 2026
Description
A flaw was found in Firefox. The Mozilla Foundation's Security Advisory describes the following issue: 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.
Statement
Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 5.4CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
CWE-754 · Improper Check for Unusual or Exceptional Conditions