The WebChannel API, which is used to transport various information across processes, did not check the sending principal but rather accepted the principal being sent. This could have led to privilege escalation attacks. This vulnerability was fixed in Firefox 134, Firefox ESR 128.6, Thunderbird 134, and Thunderbird 128.6.
References
| Link | Resource |
|---|---|
| https://bugzilla.mozilla.org/show_bug.cgi?id=1915257 | Issue Tracking Permissions Required |
| https://www.mozilla.org/security/advisories/mfsa2025-01/ | Vendor Advisory |
| https://www.mozilla.org/security/advisories/mfsa2025-02/ | Vendor Advisory |
| https://www.mozilla.org/security/advisories/mfsa2025-04/ | Vendor Advisory |
| https://www.mozilla.org/security/advisories/mfsa2025-05/ | Vendor Advisory |
| https://lists.debian.org/debian-lts-announce/2025/01/msg00004.html |
Configurations
Configuration 1 (hide)
|
History
05 Oct 2026, 15:10
| Type | Values Removed | Values Added |
|---|---|---|
| Summary | (es) La WebChannel API, que se utiliza para transportar información diversa entre procesos, no comprobó el principal de envío, sino que aceptó el principal enviado. Esto podría haber provocado ataques de escalada de privilegios. Esta vulnerabilidad afecta a Firefox menor que 134 y Firefox ESR menor que 128.6. |
30 Sep 2026, 19:10
| Type | Values Removed | Values Added |
|---|---|---|
| Summary | (es) La WebChannel API, que se utiliza para transportar información diversa entre procesos, no comprobó el principal de envío, sino que aceptó el principal enviado. Esto podría haber provocado ataques de escalada de privilegios. Esta vulnerabilidad afecta a Firefox < 134 y Firefox ESR < 128.6. |
Information
Published : 2025-01-07 16:15
Updated : 2026-10-05 15:10
NVD link : CVE-2025-0237
Mitre link : CVE-2025-0237
CVE.ORG link : CVE-2025-0237
JSON object : View
Products Affected
mozilla
- firefox
- thunderbird
CWE
CWE-863
Incorrect Authorization