Open Source Matters · Joomla! · CVE-2019-19634
**Name of the Vulnerable Software and Affected Versions**
class.upload.php versions 1.0.0 through 1.0.3
class.upload.php versions 2.0.0 through 2.0.4
**Description**
The issue is related to the omission of .pht from the set of dangerous file extensions in class.upload.php, which is similar to a previously known issue. This affects products that use this class, such as the K2 extension for Joomla.
**Recommendations**
For class.upload.php versions 1.0.0 through 1.0.3, update to a version that includes .pht in the set of dangerous file extensions.
For class.upload.php versions 2.0.0 through 2.0.4, update to a version that includes .pht in the set of dangerous file extensions.
As a temporary workaround, consider manually adding .pht to the set of dangerous file extensions to prevent potential exploitation.