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10.0
CVSS
Critical

CVE-2025-2857

PUBLISHED

Incorrect handle could lead to sandbox escapes

Exploited in the wild Remote Low complexity No user interaction
Vendor
Mozilla
Product
Firefox
Published
Mar 27, 2025
EPSS
—

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.

windows

CVSS scores

CVSS v3.1 10.0 Critical

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

Exploitation status

Exploited in the wild

Recorded 2025-03-27 13:27:57 UTC · Source

SSVC decision points

Exploitation
none
Automatable
Yes
Technical impact
total

References

Known exploited vulnerability sources

Catalogues that list this CVE as a known exploited vulnerability.

Source Added
CVE Mar 27, 2025

Timeline

  • CVE ID Reserved

  • CVE Published to Public

  • Added to KEVIntel