CVE-2025-1936

Name: CVE-2025-1936
Creator: NVD / NIST
Published: 2025-03-04T14:15:38.5+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.3/10EPSS 0.41%

Last modified Jun 17, 2026

CVE-2025-1936 is a high-severity vulnerability rated 7.3/10 on the CVSS scale. 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. EPSS estimates a 0.41% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

7.3/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

EPSS Probability

0.41%

33.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-158

Affected Software

Vendor	Product	Versions
Mozilla	Firefox	< 128.8.0
Mozilla	Firefox	< 136.0
Mozilla	Thunderbird	< 128.8.0
Mozilla	Thunderbird	>= 129.0, < 136.0

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1940027Permissions Required
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/Vendor Advisory
https://lists.debian.org/debian-lts-announce/2025/03/msg00006.html

Timeline

Published: Mar 4, 2025
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2025-1936?

How severe is CVE-2025-1936?

CVE-2025-1936 has a CVSS score of 7.3/10 (HIGH severity). The EPSS model estimates a 0.41% probability of exploitation in the next 30 days.

How do I fix CVE-2025-1936?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-1936?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST