Security Alert (A25-08-17): Multiple Vulnerabilities in Firefox

Description:

Mozilla has published the advisories (MFSA2025-64, MFSA2025-65, MFSA2025-66 and MFSA2025-67) to address multiple vulnerabilities in Firefox. A remote attacker could entice a user running a vulnerable browser to visit a web page with specially crafted content to exploit the vulnerabilities.

Affected Systems:

• Firefox Windows versions prior to version 142
• Firefox ESR Windows versions prior to version 115.27, 128.14, 140.2

Impact:

Successful exploitation of the vulnerabilities could lead to denial of service, information disclosure, security restriction bypass, spoofing or tampering 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 142 (Windows)
https://www.mozilla.org/en-US/firefox/all/#product-desktop-release
Firefox ESR 115.27, 128.14, 140.2 (Windows)
https://www.mozilla.org/en-US/firefox/all/#product-desktop-esr

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

More Information:

• https://www.mozilla.org/en-US/security/advisories/mfsa2025-64
• https://www.mozilla.org/en-US/security/advisories/mfsa2025-65
• https://www.mozilla.org/en-US/security/advisories/mfsa2025-66
• https://www.mozilla.org/en-US/security/advisories/mfsa2025-67
• https://www.hkcert.org/security-bulletin/mozilla-products-multiple-vulnerabilities_20250820
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-9179 (to CVE-2025-9187)