CVE-2025-8037: Nameless cookies shadow secure cookies in Mozilla Firefox
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.
CVE-2025-8037: Nameless cookies shadow secure cookies in Mozilla Firefox
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.
Technical Details
- Data Version
- 5.1
- Assigner Short Name
- mozilla
- Date Reserved
- 2025-07-22T10:14:04.585Z
- Cvss Version
- null
- State
- PUBLISHED
Threat ID: 687ffd51a915ff00f7fb59b8
Added to database: 7/22/2025, 9:06:25 PM
Last updated: 7/22/2025, 9:06:25 PM
Views: 1
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UnknownActions
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