CVE-2026-18645

Received Received - Intake

Path Traversal in HTMLy CMS

Publication date: 2026-08-03

Last updated on: 2026-08-03

Assigner: VulDB

Description

A security flaw has been discovered in danpros HTMLy up to 3.1.1. This affects the function add_content of the file /system/admin/admin.php of the component Admin Content Endpoint. Performing a manipulation of the argument oldfile results in path traversal. The attack may be initiated remotely. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-08-03

Last Modified

2026-08-03

Generated

2026-08-04

AI Q&A

2026-08-04

EPSS Evaluated

N/A

NVD

CVE-2026-18645

EUVD

EUVD-2026-52426

Affected Vendors & Products

Vendor	Product	Version / Range
danpros	htmly	to 3.1.1 (inc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
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.

Attack-Flow Graph

Executive Summary

This vulnerability is a path traversal flaw in danpros HTMLy up to version 3.1.1. It exists in the Admin Content Endpoint, specifically in the add_content function of the file /system/admin/admin.php. An attacker can manipulate the oldfile argument to perform path traversal, potentially accessing unauthorized files or directories. The exploit is publicly available and the vendor did not respond to the disclosure.

Detection Guidance

This vulnerability involves path traversal in danpros HTMLy up to 3.1.1 via the oldfile argument in the Admin Content Endpoint. To detect it, inspect HTTP requests to /system/admin/admin.php for unusual file path patterns in the oldfile parameter. Check server logs for suspicious path traversal attempts like '../' sequences.

Impact Analysis

This vulnerability allows remote attackers to access sensitive files or directories on the server by manipulating the oldfile argument. This could lead to unauthorized data exposure, file manipulation, or further compromise of the system. The impact depends on the server's configuration and the privileges of the web application.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, which may violate compliance requirements under GDPR (data protection) and HIPAA (health information privacy). Unauthorized access to personal or health data could result in legal penalties, reputational damage, and loss of trust.

Mitigation Strategies

Update HTMLy to the latest version beyond 3.1.1 if available. If no update exists, consider disabling the Admin Content Endpoint or restricting access to the /system/admin/admin.php file. Monitor network traffic for unusual path traversal attempts in the oldfile parameter.

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