CVE-2015-2713: Mozilla Firefox

Medium severity, CVSS 6.8. EPSS: 4% chance of exploitation in the next 30 days.

Use-after-free vulnerability in the SetBreaks function in Mozilla Firefox before 38.0, Firefox ESR 31.x before 31.7, and Thunderbird before 31.7 allows remote attackers to execute arbitrary code or cause a denial of service (heap memory corruption) via a document containing crafted text in conjunction with a Cascading Style Sheets (CSS) token sequence containing properties related to vertical text.

Affected products

• Mozilla Firefox: up to and including 37.0.2; version 31.0 only; version 31.1.0 only; version 31.1.1 only; version 31.3.0 only; version 31.5.1 only; …
• Mozilla Firefox ESR: version 31.1 only; version 31.2 only; version 31.3 only; version 31.4 only; version 31.5 only; version 31.6.0 only
• Mozilla Thunderbird: up to and including 31.5
• Novell Suse Linux Enterprise Desktop: version 12.0 only
• Novell Suse Linux Enterprise Server: version 12.0 only
• Novell Suse Linux Enterprise Software Development Kit: version 12.0 only
• Opensuse Opensuse: version 13.1 only; version 13.2 only

Published 2015-05-14. Last modified 2026-06-17.