CVE-2012-0459

CVE-2012-0459 describes a denial-of-service vulnerability in the CSS implementation of Mozilla Firefox, Thunderbird, and SeaMonkey versions 4.x through 10.0. An attacker can trigger an application crash or potentially execute arbitrary code by dynamically modifying a keyframe and then accessing its cssText. With a CVSS score of 7.5, this vulnerability is considered highly severe, allowing remote unauthenticated attackers to impact confidentiality, integrity, and availability with low attack complexity. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.