CVE-2015-0803

CVE-2015-0803 is a critical use-after-free vulnerability in Mozilla Firefox versions prior to 37.0, affecting various Canonical and openSUSE distributions as well. This flaw allows remote attackers to execute arbitrary code or cause a denial of service through a crafted HTML document by improperly handling data type constraints during the setting of a SOURCE element's attributes. With a CVSS score of 7.5, it is easily exploitable over the network with low attack complexity, potentially leading to partial confidentiality, integrity, and availability impacts. While there is no evidence of active exploitation, public exploit code, or KEV listing, the vulnerability has garnered significant community discussion and media coverage, indicating its perceived importance.