Mozilla on Tuesday released Firefox version 14.0.1 to patch a slew of vulnerabilities. Five of the 18 bugs fixed are labeled as “critical,” giving attackers the ability to run malicious software. According to Mozilla's Security Advisories post, two of the most concerning flaws were discovered in the “javascript: URL,” which could allow miscreants to evade the JavaScript sandbox to execute malicious code, as well as “JSDependentString,” which may enable attackers to crash the browser and corrupt memory. The remaining vulnerabilities, if not patched, could facilitate the execution of arbitrary code, cross-site scripting and phishing attacks.

[An earlier version of this story incorrectly stated that 14 vulnerabilities were patched, when it was actually 18].