Mozilla Firefox patches critical security vulnerabilities with exploit PoC

Mozilla has released critical security updates for Firefox to patch two actively exploited vulnerabilities (CVE-2025-4920 and CVE-2025-4921). Following successful exploitation demonstrations at Pwn2Own Berlin 2025, Mozilla strongly urges all users to immediately update to the latest browser versions across all supported branches.

**This one is important, and fairly urgent. The exploit PoC is public, so it's just a matter of time before hackers build an exploit. So don't wait. Patch all your Firefox and Firefox based browsers (Waterfox, Tor) NOW. Updating a browser is easy, all your tabs reopen after the patch.**
#cybersecurity #infosec #advisory #vulnerability
https://beyondmachines.net/event_details/mozilla-firefox-patches-critical-security-vulnerabilities-with-exploit-poc-t-j-m-t-b/gD2P6Ple2L