Critical severity · published Jul 22, 2025
CVE-2025-8031
The `username:password` part was not correctly stripped from URLs in CSP reports potentially leaking HTTP Basic Authentication credentials
9.8
CVSS
0.5%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 43% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FI
Firefox · Mozilla
before 128.13.0; before 141.0; 140.0 before 140.1.0 · source: NVD
TH
Thunderbird · Mozilla
before 128.13.0; before 141.0; 140.0 before 140.1.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-8031
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-8031
Permissions Required
https://bugzilla.mozilla.org/show_bug.cgi?id=1971719
Vendor Advisory
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/
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