Security Alert: Multiple Mozilla Vulnerabilities Discovered — How PC Matic Protects You

The Multi-State Information Sharing & Analysis Center (MS-ISAC) recently issued a cybersecurity advisory (2025-035) regarding several newly discovered vulnerabilities in Mozilla products. The most critical of these could allow attackers to execute arbitrary code on a victim’s machine. This is a tactic often used to install malicious programs, steal data, or escalate privileges within a network.

While there are no reports of these vulnerabilities being exploited in the wild currently, now is the time to take action and protect your systems.

How PC Matic Helps

At PC Matic, your security is our top priority. Our layered protection strategy proactively addresses the most common attack vectors, including those highlighted in this advisory. Here’s how we help:

Application Allowlisting for Execution Prevention

MS-ISAC Safeguards 2.5 and 2.7 recommend using technical controls to prevent unauthorized applications and scripts from executing. This is where PC Matic’s default-deny allowlisting technology shines.

• 2.5 – Allowlist Authorized Software: PC Matic’s allowlisting ensures only known-good, trusted applications can run on your device. If an attacker attempts to execute malicious code or install unauthorized programs via one of these Mozilla vulnerabilities, PC Matic will block the attempt.
• 2.7 – Allowlist Authorized Scripts: PC Matic also controls script execution, including .ps1 (PowerShell), .py (Python), and other commonly abused file types. This helps to block attacks triggered by malicious scripts embedded in websites or phishing emails.

Automated Patch Management for Mozilla Products

Another key recommendation from the advisory (M1051: Update Software) is to ensure systems are running the latest, fully supported versions of software. That’s why PC Matic includes automated patch management for third-party applications, including:

• Mozilla Firefox
• Mozilla Thunderbird

With PC Matic, you don’t need to worry about keeping your software up to date. As soon as Mozilla releases patches (like Firefox 137 or Thunderbird 137), we automatically install them after testing. This helps you close security gaps quickly and efficiently.

Final Thoughts

Cyber threats continue to evolve, but so does PC Matic. Our commitment to proactive prevention, not reactive detection, helps keep your systems secure — even as new zero-day vulnerabilities emerge.

We encourage all PC Matic users to enable Patch Management and to take advantage of our robust allowlisting capabilities. Together, these features form a powerful defense against modern cyberattacks.