CVE-2026-18644 | danpros HTMLy up to 3.1.1 Delete Username Endpoint /system/htmly.php unlink File path traversal

A vulnerability, which was classified as critical, was found in danpros HTMLy up to 3.1.1. Affected by this issue is the function unlink of the file /system/htmly.php of the component Delete Username Endpoint. Such manipulation of the argument File leads to path traversal.

This vulnerability is uniquely identified as CVE-2026-18644. The attack can be launched remotely. Moreover, an exploit is present.

The vendor was contacted early about this disclosure but did not respond in any way.