CVE-2026-45233 HTMLy CMS 3.1.1 Path Traversal via oldfile Parameter in Autosave
Low-privileged authenticated attackers can relocate arbitrary files via path traversal in the autosave endpoint, potentially modifying data.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-45233?
CVE-2026-45233 is a high-severity path traversal vulnerability in danpros htmly, published on 25 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Weakness: CWE-22
Which versions are affected by CVE-2026-45233?
How do I fix CVE-2026-45233?
No fix has been published for CVE-2026-45233 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-45233 being exploited?
There is no known exploitation of CVE-2026-45233 in the wild and no public exploit code.
Sources
Also known as GHSA-mhrm-pq8h-qmf3.