danpros htmly up to 3.1.1 Admin Autosave Endpoint admin.php file_exists oldfile path traversal

Summaryinfo

A vulnerability has been found in danpros htmly up to 3.1.1 and classified as critical. This impacts the function file_exists of the file admin.php of the component Admin Autosave Endpoint. The manipulation of the argument oldfile leads to path traversal. This vulnerability is listed as CVE-2026-45233. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability, which was classified as critical, has been found in danpros htmly up to 3.1.1. This issue affects the function file_exists of the file admin.php of the component Admin Autosave Endpoint. The manipulation of the argument oldfile with an unknown input leads to a path traversal vulnerability. Using CWE to declare the problem leads to CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. Impacted is integrity, and availability. The summary by CVE is:

HTMLy CMS through 3.1.1 contains a path traversal vulnerability that allows low-privileged authenticated attackers to relocate arbitrary files by supplying directory traversal sequences in the oldfile parameter at the admin autosave endpoint. Attackers can pass unsanitized traversal sequences directly to file_exists() and rename() functions in admin.php without canonicalization or directory boundary enforcement to cause unintended relocation of any file writable by the web server process to an attacker-specified draft location.

The weakness was presented by Midhun Mohanan. It is possible to read the advisory at gist.github.com. The identification of this vulnerability is CVE-2026-45233 since 05/11/2026. The exploitation is known to be easy. The attack may be initiated remotely. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 06/25/2026). The attack technique deployed by this issue is T1006 according to MITRE ATT&CK.

By approaching the search of inurl:admin.php it is possible to find vulnerable targets with Google Hacking.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• danpros

Name

• htmly

Version

• 3.1.0
• 3.1.1

CPE 2.3info

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CPE 2.2info

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