Vulnerability Monitor

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CVE-2025-8036

Thunderbird cached CORS preflight responses across IP address changes. This allowed circumventing CORS with DNS rebinding. This vulnerability affects Firefox < 141, Firefox ESR < 140.1, Thunderbird < 141, and Thunderbird < 140.1.

Published

2025-07-22T21:15:50.760

Last Modified

2025-09-29T23:02:08.670

Status

Analyzed

Source

[email protected]

Severity

CVSSv3.1: 8.1 (HIGH)

Weaknesses

Type: Secondary
CWE-350

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	mozilla	firefox	< 140.1.0	Yes
Application	mozilla	firefox	< 141.0	Yes
Application	mozilla	thunderbird	< 140.1.0	Yes
Application	mozilla	thunderbird	< 141.0	Yes

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1960834 Permissions Required ([email protected])
https://www.mozilla.org/security/advisories/mfsa2025-56/ Vendor Advisory ([email protected])
https://www.mozilla.org/security/advisories/mfsa2025-59/ Vendor Advisory ([email protected])
https://www.mozilla.org/security/advisories/mfsa2025-61/ Vendor Advisory ([email protected])
https://www.mozilla.org/security/advisories/mfsa2025-63/ Vendor Advisory ([email protected])