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CVE-2025-2857
Date: March 27, 2025
Following the sanbdox escape in CVE-2025-2783, various Firefox developers identified a similar pattern in our IPC code. Attackers were able to confuse the parent process into leaking handles into unpriviled child processes leading to a sandbox escape. The original vulnerability was being exploited in the wild. This only affects Firefox on Windows. Other operating systems are unaffected. This vulnerability affects Firefox < 136.0.4, Firefox ESR < 128.8.1, and Firefox ESR < 115.21.1.
Severity Score
Related Resources (6)
Severity Score
Weakness Type (CWE)
Improper Access Control
CWE-284CVSS v3.1
| Base Score: |  | 
|---|---|
| Attack Vector (AV): | NETWORK | 
| Attack Complexity (AC): | LOW | 
| Privileges Required (PR): | NONE | 
| User Interaction (UI): | NONE | 
| Scope (S): | CHANGED | 
| Confidentiality (C): | HIGH | 
| Integrity (I): | HIGH | 
| Availability (A): | HIGH | 
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