CVE-2023-51646: Alltena Allegra

Medium severity, CVSS 4.7. EPSS: 1.8% chance of exploitation in the next 30 days.

Allegra uploadSimpleFile Directory Traversal Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Allegra. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed. The specific flaw exists within the uploadSimpleFile method. The issue results from the lack of proper validation of a user-supplied path prior to using it in file operations. An attacker can leverage this vulnerability to execute code in the context of LOCAL SERVICE. Was ZDI-CAN-22527.

Affected products

• Alltena Allegra: before 7.5.1 (fixed in 7.5.1)

Published 2024-11-22. Last modified 2026-06-17.