CVE-2025-2857

critical · 10

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.

CVSS

1.9%

EPSS (exploit prob.)

79th

EPSS percentile

2025-03-27

Published

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Weaknesses

CWE-668

Affected products

Vendor	Product	Affected versions
mozilla	firefox	< 136.0.4
mozilla	firefox	< 115.21.1
mozilla	firefox	>= 128.1.0, < 128.8.1

Check a specific version with /api/v1/cve/match.

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1956398
https://issues.chromium.org/issues/405143032
https://www.cve.org/CVERecord?id=CVE-2025-2783
https://www.mozilla.org/security/advisories/mfsa2025-19/

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2025-2857