CVE-2025-0241

Name: CVE-2025-0241
Creator: NVD / NIST
Published: 2025-01-07T16:15:38.767+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.7/10EPSS 0.72%

Last modified Jun 17, 2026

CVE-2025-0241 is a high-severity vulnerability rated 7.7/10 on the CVSS scale. When segmenting specially crafted text, segmentation would corrupt memory leading to a potentially exploitable crash. This vulnerability was fixed in Firefox 134, Firefox ESR 128.6, Thunderbird 134, and Thunderbird 128.6.. EPSS estimates a 0.72% chance of exploitation in the next 30 days.

Description

When segmenting specially crafted text, segmentation would corrupt memory leading to a potentially exploitable crash. This vulnerability was fixed in Firefox 134, Firefox ESR 128.6, Thunderbird 134, and Thunderbird 128.6.

Metrics

CVSS 3.1

7.7/10

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

EPSS Probability

0.72%

49.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-401

Affected Software

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

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1933023Issue 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/mfsa2025-04/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-2025-0241?

How severe is CVE-2025-0241?

CVE-2025-0241 has a CVSS score of 7.7/10 (HIGH severity). The EPSS model estimates a 0.72% probability of exploitation in the next 30 days.

How do I fix CVE-2025-0241?

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-2025-0241?

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

Scan your code now

Source: NVD / NIST