Boundary Condition Flaw in WebGPU Component of Firefox
CVE-2025-13021

9.8CRITICAL

Key Information:

Vendor

Mozilla
Status
Firefox
Thunderbird
Vendor
CVE Published:
11 November 2025

What is CVE-2025-13021?

A boundary condition vulnerability exists in the WebGPU component of Firefox, which may allow unauthorized access or manipulation of graphical data. This flaw affects all versions of the browser below 145, potentially compromising user security and privacy. It is critical for users and administrators to update their Firefox installations to the latest version to mitigate risks associated with this vulnerability.

Affected Version(s)

Firefox < 145

Thunderbird < 145

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1986431
https://www.mozilla.org/security/advisories/mfsa2025-87/
https://www.mozilla.org/security/advisories/mfsa2025-90/

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Atte Kettunen
JSON
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CVE-2025-13021 : Boundary Condition Flaw in WebGPU Component of Firefox