Mozilla Multiple Products Remote Code Execution Vulnerability. Actively exploited: CISA added this vulnerability to its Known Exploited Vulnerabilities catalog on 06/10/2025. Patch affected systems as an emergency.
| Package | Affected versions | Patched versions |
|---|---|---|
| firefox | = 3.5= 3.5.1= 3.5.10= 3.5.11= 3.5.12= 3.5.13= 3.5.14= 3.5.2= 3.5.3= 3.5.4= 3.5.5= 3.5.6= 3.5.7= 3.5.8= 3.5.9= 3.6= 3.6.10= 3.6.11= 3.6.2= 3.6.3= 3.6.4= 3.6.6= 3.6.7= 3.6.8= 3.6.9 | |
| seamonkey | = 2.0= 2.0.1= 2.0.2= 2.0.3= 2.0.4= 2.0.5= 2.0.6= 2.0.7= 2.0.8= 2.0.9 | |
| thunderbird | = 3.0.1= 3.0.2= 3.0.3= 3.0.4= 3.0.5= 3.0.6= 3.0.7= 3.0.8= 3.0.9= 3.1.1= 3.1.2= 3.1.3= 3.1.4= 3.1.5 |
Mozilla Firefox 3.5.x through 3.5.14 and 3.6.x through 3.6.11, Thunderbird 3.1.6 before 3.1.6 and 3.0.x before 3.0.10, and SeaMonkey 2.x before 2.0.10, when JavaScript is enabled, allows remote attackers to execute arbitrary code via vectors related to nsCSSFrameConstructor::ContentAppended, the appendChild method, incorrect index tracking, and the creation of multiple frames, which triggers memory corruption, as exploited in the wild in October 2010 by the Belmoo malware.
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