CVE-2025-2857 Details
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.
A vulnerability allowing sandbox escape has been identified in Mozilla Firefox on Windows. A compromised child process could manipulate the parent process into granting an unintentionally powerful handle, similar to a recent vulnerability in Google Chrome (CVE-2025-2783). This issue affects Firefox versions prior to 136.0.4, as well as Firefox ESR versions prior to 128.8.1 and 115.21.1.
Users can upgrade to Firefox 136.0.4, Firefox ESR 128.8.1, or Firefox ESR 115.21.1 to address this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Mar 28, 2025References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://bugzilla.mozilla.org/show_bug.cgi?id=1956398 | [email protected] | Permissions Required |
| https://issues.chromium.org/issues/405143032 | [email protected] | Permissions Required |
| https://www.cve.org/CVERecord?id=CVE-2025-2783 | [email protected] | Third Party Advisory |
| https://www.mozilla.org/security/advisories/mfsa2025-19/ | [email protected] | Vendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| NVD-CWE-noinfo | Insufficient Information to Classify Weakness | [email protected] |
| CWE-668 | Exposure of Resource to Wrong Sphere | CISA-ADP |
Affected Products
| Product | Versions |
|---|---|
| mozilla firefox | < 136.0.4 < 115.21.1 >= 128.1.0, < 128.8.1 |
CPE
Remediation
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Change History
9 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 13, 2026 | CVE Modified | [email protected] |
| Oct 31, 2025 | CVE Modified | CISA-ADP |
| May 1, 2025 | Initial Analysis | [email protected] |
| Mar 28, 2025 | CVE Modified | CISA-ADP |
| Mar 27, 2025 | CVE Modified | [email protected] |
| Mar 27, 2025 | CVE Modified | [email protected] |
| Mar 27, 2025 | New CVE Received | [email protected] |