MozillaThunderbird was updated to version 31.5.0 to fix four security issues.

These security issues were fixed:
- CVE-2015-0836: Miscellaneous memory safety hazards
- CVE-2015-0831: Use-after-free in IndexedDB
- CVE-2015-0827: Out-of-bounds read and write while rendering SVG content
- CVE-2015-0822: Reading of local files through manipulation of form autocomplete