CVE-2025-4082

Name: CVE-2025-4082
Creator: NVD / NIST
Published: 2025-04-29T14:15:34.913+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.9/10EPSS 0.36%

Last modified Jun 17, 2026

CVE-2025-4082 is a medium-severity vulnerability rated 5.9/10 on the CVSS scale. Modification of specific WebGL shader attributes could trigger an out-of-bounds read, which, when chained with other vulnerabilities, could be used to escalate privileges. *This bug only affects Thunderbird for macOS. Other versions of Thunderbird are unaffected.*. EPSS estimates a 0.36% chance of exploitation in the next 30 days.

Description

Modification of specific WebGL shader attributes could trigger an out-of-bounds read, which, when chained with other vulnerabilities, could be used to escalate privileges. *This bug only affects Thunderbird for macOS. Other versions of Thunderbird are unaffected.*. This vulnerability was fixed in Firefox 138, Firefox ESR 128.10, Firefox ESR 115.23, Thunderbird 138, and Thunderbird 128.10.

Metrics

CVSS 3.1

5.9/10

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

EPSS Probability

0.36%

28.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-125

Affected Software

Vendor	Product	Versions
Mozilla	Firefox	< 115.23
Mozilla	Firefox	< 138.0
Mozilla	Firefox	>= 128.0, < 128.10
Mozilla	Thunderbird	< 128.10.0
Mozilla	Thunderbird	< 138.0

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1937097Permissions Required
https://www.mozilla.org/security/advisories/mfsa2025-28/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-29/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-30/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-31/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-32/Vendor Advisory
https://lists.debian.org/debian-lts-announce/2025/05/msg00022.html

Timeline

Published: Apr 29, 2025
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2025-4082?

How severe is CVE-2025-4082?

CVE-2025-4082 has a CVSS score of 5.9/10 (MEDIUM severity). The EPSS model estimates a 0.36% probability of exploitation in the next 30 days.

How do I fix CVE-2025-4082?

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-2025-4082?

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

Scan your code now

Source: NVD / NIST