Security Alert (A25-05-15): Multiple Vulnerabilities in Firefox

Description:

Mozilla has published the advisories (MFSA2025-36, MFSA2025-37 and MFSA2025-38) to address multiple vulnerabilities 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 Windows versions prior to version 138.0.4
• Firefox ESR Windows versions prior to version 115.23.1, 128.10.1

Impact:

Successful exploitation of the vulnerabilities could lead to remote code execution, denial of service or information disclosure 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 138.0.4 (Windows)
https://www.mozilla.org/en-US/firefox/all/#product-desktop-release
Firefox ESR 115.23.1, 128.10.1 (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/mfsa2025-36/
• https://www.mozilla.org/en-US/security/advisories/mfsa2025-37/
• https://www.mozilla.org/en-US/security/advisories/mfsa2025-38/
• https://www.hkcert.org/security-bulletin/mozilla-firefox-multiple-vulnerabilities_20250519
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-4918 (to CVE-2025-4919)