danpros HTMLy up to 3.1.1 Author Name /system/htmly.php path traversal

Summaryinfo

A vulnerability was found in danpros HTMLy up to 3.1.1. It has been classified as critical. This issue affects some unknown processing of the file /system/htmly.php of the component Author Name Handler. The manipulation of the argument Name leads to path traversal. This vulnerability is referenced as CVE-2026-18646. Remote exploitation of the attack is possible. Furthermore, an exploit is available. The vendor was contacted early about this disclosure but did not respond in any way.

Detailsinfo

A vulnerability was found in danpros HTMLy up to 3.1.1 and classified as critical. This issue affects an unknown code block of the file /system/htmly.php of the component Author Name Handler. The manipulation of the argument name 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 confidentiality.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-18646. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details as well as a public exploit are known. MITRE ATT&CK project uses the attack technique T1006 for this issue.

The exploit is available at github.com. It is declared as proof-of-concept. The vendor was contacted early about this disclosure but did not respond in any way. By approaching the search of inurl:system/htmly.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

• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒

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Exploitinginfo

Threat Intelligenceinfo

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Entryinfo

Submitinfo

Accepted

• Submit #854995: danpros htmly v3.1.1 (latest) Path Traversal (by orionyan)

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