Vulnerability Description
The `username:password` part was not correctly stripped from URLs in CSP reports potentially leaking HTTP Basic Authentication credentials. This vulnerability was fixed in Firefox 141, Firefox ESR 128.13, Firefox ESR 140.1, Thunderbird 141, Thunderbird 128.13, and Thunderbird 140.1.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | < 128.13.0 |
| Mozilla | Thunderbird | < 128.13.0 |
Related Weaknesses (CWE)
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1971719Permissions Required
- https://www.mozilla.org/security/advisories/mfsa2025-56/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-58/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-59/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-61/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-62/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-63/Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2025/07/msg00016.html
FAQ
What is CVE-2025-8031?
CVE-2025-8031 is a vulnerability with a CVSS score of 9.8 (CRITICAL). The `username:password` part was not correctly stripped from URLs in CSP reports potentially leaking HTTP Basic Authentication credentials. This vulnerability was fixed in Firefox 141, Firefox ESR 128...
How severe is CVE-2025-8031?
CVE-2025-8031 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2025-8031?
Check the references section above for vendor advisories and patch information. Affected products include: Mozilla Firefox, Mozilla Thunderbird.