CVE-2013-0787: Mozilla Firefox

High severity, CVSS 9.3. EPSS: 6.4% chance of exploitation in the next 30 days.

Use-after-free vulnerability in the nsEditor::IsPreformatted function in editor/libeditor/base/nsEditor.cpp in Mozilla Firefox before 19.0.2, Firefox ESR 17.x before 17.0.4, Thunderbird before 17.0.4, Thunderbird ESR 17.x before 17.0.4, and SeaMonkey before 2.16.1 allows remote attackers to execute arbitrary code via vectors involving an execCommand call.

Affected products

• Mozilla Firefox: up to and including 19.0.1; version 19.0 only; version 17.0 only; version 17.0.1 only; version 17.0.2 only; version 17.0.3 only
• Mozilla Seamonkey: up to and including 2.16; version 2.16 only
• Mozilla Thunderbird: up to and including 17.0.3; version 17.0 only; version 17.0.1 only; version 17.0.2 only
• Mozilla Thunderbird ESR: version 17.0 only; version 17.0.1 only; version 17.0.2 only; version 17.0.3 only

Published 2013-03-11. Last modified 2026-06-16.