CVE-2025-2857
CRITICAL EXPLOITEDFirefox < 136.0.4, 115.21.1, 128.8.1-128.*, 136.0.4-136.* - Sandbox Escape via IPC Handle Mismanagement
Title source: llmExploitation Summary
CVE-2025-2857 has been observed exploited in the wild (reported by VulnCheck KEV). EIP tracks 1 public exploit from researchers including Leviticus-Triage.
AI-analyzed exploit summary The repository appears to be a framework for Chrome exploits but lacks actual exploit code for CVE-2025-2857. It contains extensive documentation, contribution guidelines, and placeholder structures but no functional PoC or technical details specific to the CVE.
Description
Following the recent Chrome sandbox escape (CVE-2025-2783), various Firefox developers identified a similar pattern in our IPC code. A compromised child process could cause the parent process to return an unintentionally powerful handle, 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 was fixed in Firefox 136.0.4, Firefox ESR 128.8.1, and Firefox ESR 115.21.1.
Exploits (1)
The repository appears to be a framework for Chrome exploits but lacks actual exploit code for CVE-2025-2857. It contains extensive documentation, contribution guidelines, and placeholder structures but no functional PoC or technical details specific to the CVE.
References (4)
Scores
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H