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CVE-2026-18644— danpros HTMLy Delete Username Endpoint htmly.php unlink path traversal

Quick assessment

Affected
danpros HTMLy
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

HTMLy是HTMLy团队开源的一个内容管理系统。 HTMLy 3.1.1及之前版本存在路径遍历漏洞，该漏洞源于/system/htmly.php文件中unlink函数对File参数处理不当，导致路径遍历，攻击者可远程利用。

CVSS 5.4 · Medium EPSS 0.54% · P44

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 2

VendorProduct Version RangeStatus
danpros HTMLy 3.1.0 affected
3.1.1 affected
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I. Basic Information for CVE-2026-18644

Vulnerability Information
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Vulnerability Title
danpros HTMLy Delete Username Endpoint htmly.php unlink path traversal
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was identified 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. The attack can be launched remotely. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
HTMLy 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
HTMLy是HTMLy团队开源的一个内容管理系统。 HTMLy 3.1.1及之前版本存在路径遍历漏洞，该漏洞源于/system/htmly.php文件中unlink函数对File参数处理不当，导致路径遍历，攻击者可远程利用。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
danpros HTMLy 3.1.0 cpe:2.3:a:htmly:htmly:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-18644

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III. Intelligence Information for CVE-2026-18644

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News Coverage for CVE-2026-18644 (1)

Same Patch Batch · danpros · 2026-08-03 · 3 CVEs total

CVE-2026-18645 5.4 MEDIUM danpros HTMLy Admin Content Endpoint admin.php add_content path traversal
CVE-2026-18646 5.3 MEDIUM danpros HTMLy Author Name htmly.php path traversal

IV. Related Vulnerabilities

Same product: HTMLy
Same vendor: danpros
Same weakness: CWE-22

V. Comments for CVE-2026-18644

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