Security Alert (A25-03-25): Vulnerability in Firefox

Description:

Mozilla has published an advisory (MFSA2025-19) to address a vulnerability in Firefox browser. A remote attacker could entice a user running a vulnerable browser to visit a web page with specially crafted content to exploit the vulnerability.

Affected Systems:

• Firefox Window versions prior to version 136.0.4
• Firefox ESR Windows versions prior to version 115.21.1, 128.8.1

Impact:

Successful exploitation of the vulnerability could lead to security restriction bypass on an affected system.

Recommendation:

Mozilla has released new versions of the product to address the issues and they can be downloaded at the following URLs:
Firefox 136.0.4 (Windows)
https://www.mozilla.org/en-US/firefox/all/#product-desktop-release
Firefox ESR 115.21.1, 128.8.1 (Windows)
https://www.mozilla.org/en-US/firefox/all/#product-desktop-esr

Users of affected systems should follow the recommendations provided by the vendor and take immediate actions to mitigate the risk.

More Information:

• https://www.mozilla.org/en-US/security/advisories/mfsa2025-19/
• https://www.hkcert.org/security-bulletin/mozilla-firefox-security-restriction-bypass-vulnerability_20250328
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-2857