Open Source Matters · Joomla! · CVE-2015-8562
**Name of the Vulnerable Software and Affected Versions**
Joomla! versions 1.5.x through 3.x before 3.4.6
**Description**
The issue allows remote attackers to conduct PHP object injection attacks and execute arbitrary PHP code via the HTTP User-Agent header. This has been exploited in the wild.
**Recommendations**
For versions 1.5.x, 2.x, and 3.x before 3.4.6, update to version 3.4.6 or later to resolve the issue.