CVE Catalog

CVE-2026-45233

HighCVSS 8.1
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.57%

43th percentile - higher than 43% of all known CVEs

Summary

HTMLy CMS through version 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, causing unintended relocation of any file writable by the web server process to an attacker-specified draft location.

Risk Assessment

The risk is that an attacker can relocate critical system or configuration files, potentially leading to data integrity compromise, privilege escalation, or full server takeover.

Recommendation

Immediately update HTMLy CMS to the latest available version that fixes this vulnerability. If an update is not possible, restrict access to the admin panel to trusted IP addresses and implement validation of the oldfile parameter to block directory traversal sequences.

Related vulnerabilities

Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS