Path Traversal Vulnerability in HTMLy CMS
CVE-2026-45233

7.2HIGH

Key Information:

Vendor

Danpros

Status
Htmly
Vendor
CVE Published:
25 June 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-45233?

HTMLy CMS versions up to 3.1.1 are impacted by a path traversal vulnerability that enables low-privileged authenticated attackers to relocate files arbitrarily. This occurs through the incorporation of unvalidated directory traversal sequences in the 'oldfile' parameter via the admin autosave endpoint. Attackers can exploit functions like file_exists() and rename() in admin.php without proper checks, leading to unsafe file manipulations that allow them to redirect writable files to unauthorized locations on the server.

Affected Version(s)

htmly 0 <= 3.1.1

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-45233 - Proof of Concept

References

https://gist.github.com/mrgr4yhat/c4df971eafa272ac8c86c15...
technical-descriptionexploit
https://www.vulncheck.com/advisories/htmly-cms-path-trave...
third-party-advisory

CVSS V4

Score:
7.2
Severity:
HIGH
Confidentiality:
None
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Midhun Mohanan
.