CVE-2025-2857
Mozilla Firefox Windows IPC Sandbox Escape
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 affects Firefox < 136.0.4, Firefox ESR < 128.8.1, and Firefox ESR < 115.21.1.
INFO
Published Date :
March 27, 2025, 2:15 p.m.
Last Modified :
March 28, 2025, 4:15 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
6.0
Exploitability Score :
3.9
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2025-2857.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-2857 vulnerability anywhere in the article.
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Help Net Security
Week in review: Chrome sandbox escape 0-day fixed, Microsoft adds new AI agents to Security Copilot
Here’s an overview of some of last week’s most interesting news, articles, interviews and videos: Microsoft’s new AI agents take on phishing, patching, alert fatigue Microsoft is rolling out a new gen ... Read more
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Help Net Security
Critical Firefox, Tor Browser sandbox escape flaw fixed (CVE-2025-2857)
Google’s fixing of CVE-2025-2783, a Chrome zero-day vulnerability exploited by state-sponsored attackers, has spurred Firefox developers to check whether the browser might have a similar flaw – and th ... Read more
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The Cyber Express
Firefox Patch Released as Mozilla Addresses Chrome-Like Security Threat
Mozilla has issued an urgent update for Firefox on Windows to patch a critical security vulnerability. This Firefox vulnerability move follows the recent discovery of a similar exploit in Google Chrom ... Read more
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The Register
After Chrome patches zero-day used to target Russians, Firefox splats similar bug
Google pushed out an emergency patch for Chrome on Windows this week to stop attackers exploiting a sandbox-breaking zero-day vulnerability, seemingly used by snoops to target certain folks in Russia. ... Read more
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The Hacker News
Mozilla Patches Critical Firefox Bug Similar to Chrome’s Recent Zero-Day Vulnerability
Zero-Day / Browser Security Mozilla has released updates to address a critical security flaw impacting its Firefox browser for Windows, merely days after Google patched a similar flaw in Chrome that c ... Read more
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BleepingComputer
Mozilla warns Windows users of critical Firefox sandbox escape flaw
Mozilla has released Firefox 136.0.4 to patch a critical security vulnerability that can let attackers escape the web browser's sandbox on Windows systems. Tracked as CVE-2025-2857, this flaw is descr ... Read more
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security.nl
Mozilla waarschuwt voor kritiek beveiligingslek in Firefox
Mozilla waarschuwt gebruikers van Firefox voor een kritieke kwetsbaarheid in de Windowsversie van de browser en heeft updates uitgebracht om het probleem te verhelpen. Het oorspronkelijke probleem dat ... Read more
The following table lists the changes that have been made to the
CVE-2025-2857 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Mar. 28, 2025
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H -
CVE Modified by [email protected]
Mar. 27, 2025
Action Type Old Value New Value Changed Description Following the sandbox 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 to unprivileged 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. 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 affects Firefox < 136.0.4, Firefox ESR < 128.8.1, and Firefox ESR < 115.21.1. Added Reference https://www.cve.org/CVERecord?id=CVE-2025-2783 -
CVE Modified by [email protected]
Mar. 27, 2025
Action Type Old Value New Value Changed Description 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. Following the sandbox 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 to unprivileged 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. -
New CVE Received by [email protected]
Mar. 27, 2025
Action Type Old Value New Value Added Description 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. Added Reference https://bugzilla.mozilla.org/show_bug.cgi?id=1956398 Added Reference https://issues.chromium.org/issues/405143032 Added Reference https://www.mozilla.org/security/advisories/mfsa2025-19/
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-2857 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2025-2857
weaknesses.