vulnerability
Ubuntu: USN-7991-1 (CVE-2025-8037): Thunderbird vulnerabilities
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 9 | (AV:N/AC:L/Au:N/C:C/I:C/A:N) | Jul 22, 2025 | Jul 24, 2025 | Feb 4, 2026 |
Severity
9
CVSS
(AV:N/AC:L/Au:N/C:C/I:C/A:N)
Published
Jul 22, 2025
Added
Jul 24, 2025
Modified
Feb 4, 2026
Description
Setting a nameless cookie with an equals sign in the value shadowed other cookies. Even if the nameless cookie was set over HTTP and the shadowed cookie included the `Secure` attribute. This vulnerability affects Firefox < 141, Firefox ESR < 140.1, Thunderbird < 141, and Thunderbird < 140.1.
Solution
ubuntu-upgrade-thunderbird
References
- CVE-2025-8037
- https://attackerkb.com/topics/CVE-2025-8037
- CWE-614
- UBUNTU-USN-7991-1
- URL-https://bugzilla.mozilla.org/show_bug.cgi?id=1964767
- URL-https://www.cve.org/CVERecord?id=CVE-2025-8037
- URL-https://www.mozilla.org/en-US/security/advisories/mfsa2025-56/#CVE-2025-8037
- URL-https://www.mozilla.org/security/advisories/mfsa2025-56/
- URL-https://www.mozilla.org/security/advisories/mfsa2025-59/
- URL-https://www.mozilla.org/security/advisories/mfsa2025-61/
- URL-https://www.mozilla.org/security/advisories/mfsa2025-63/
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