CVE-2025-8037
July 23, 2025, 3:15 p.m.
9.1
Critical
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.
Product(s) Impacted
| Vendor | Product | Versions |
|---|---|---|
| Mozilla |
|
|
Weaknesses
Common security weaknesses mapped to this vulnerability.
CWE-614
Sensitive Cookie in HTTPS Session Without 'Secure' Attribute
The Secure attribute for sensitive cookies in HTTPS sessions is not set, which could cause the user agent to send those cookies in plaintext over an HTTP session.
*CPE(s)
Affected systems and software identified for this CVE.
| Type | Vendor | Product | Version | Update | Edition | Language | Software Edition | Target Software | Target Hardware | Other Information |
|---|---|---|---|---|---|---|---|---|---|---|
| a | mozilla | firefox | <141 | / | / | / | / | / | / | / |
| a | mozilla | firefox | esr | <140.1 | / | / | / | / | / | / |
| a | mozilla | thunderbird | <141 | / | / | / | / | / | / | / |
| a | mozilla | thunderbird | <140.1 | / | / | / | / | / | / | / |
Tags
CVSS Score
CVSS Data - 3.1
- Attack Vector: NETWORK
- Attack Complexity: LOW
- Privileges Required: NONE
- Scope: UNCHANGED
- Confidentiality Impact: HIGH
- Integrity Impact: HIGH
- Availability Impact: NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Timeline
Published: July 22, 2025, 9:15 p.m.
Last Modified: July 23, 2025, 3:15 p.m.
Last Modified: July 23, 2025, 3:15 p.m.
Status : Received
CVE has been recently published to the CVE List and has been received by the NVD.
More infoSource
security@mozilla.org
*Disclaimer: Some vulnerabilities do not have an associated CPE. To enhance the data, we use AI to infer CPEs based on CVE details. This is an automated process and might not always be accurate.