CVE-2025-0238

Name: CVE-2025-0238
Creator: NVD / NIST
Published: 2025-01-07T16:15:38.47+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 0.80%

Last modified Jun 17, 2026

CVE-2025-0238 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. Assuming a controlled failed memory allocation, an attacker could have caused a use-after-free, leading to a potentially exploitable crash. This vulnerability was fixed in Firefox 134, Firefox ESR 128.6, Firefox ESR 115.19, Thunderbird 134, and Thunderbird 128.6.. EPSS estimates a 0.80% chance of exploitation in the next 30 days.

Description

Assuming a controlled failed memory allocation, an attacker could have caused a use-after-free, leading to a potentially exploitable crash. This vulnerability was fixed in Firefox 134, Firefox ESR 128.6, Firefox ESR 115.19, Thunderbird 134, and Thunderbird 128.6.

Metrics

CVSS 3.1

5.3/10

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

EPSS Probability

0.80%

51.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-416

Affected Software

Vendor	Product	Versions
Mozilla	Firefox	< 115.19.0
Mozilla	Firefox	< 134.0
Mozilla	Firefox	>= 116.0, < 128.6.0
Mozilla	Thunderbird	< 128.6
Mozilla	Thunderbird	>= 129.0, < 134.0

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1915535Issue Tracking, Permissions Required
https://www.mozilla.org/security/advisories/mfsa2025-01/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-02/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-03/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-04/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-05/Vendor Advisory
https://lists.debian.org/debian-lts-announce/2025/01/msg00004.html

Timeline

Published: Jan 7, 2025
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2025-0238?

How severe is CVE-2025-0238?

CVE-2025-0238 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 0.80% probability of exploitation in the next 30 days.

How do I fix CVE-2025-0238?

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-2025-0238?

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

Scan your code now

Source: NVD / NIST