CVE-2026-18933 wp-downloadmanager - Unrestricted File Upload via Missing Extension/MIME Validation and Path Traversal
Admins can upload arbitrary files due to missing validation, potentially leading to remote code execution on WordPress sites.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-18933?
CVE-2026-18933 is a high-severity vulnerability in wp-downloadmanager, published on 5 Aug 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
The wp-downloadmanager WordPress plugin, in version 1.68.11 (also affecting the 6.9.4 release line), allows an admin-privileged user (current_user_can('manage_downloads')) to upload arbitrary files via download-add.php with no extension or MIME-type validation of any kind - no wp_check_filetype_and_ext, no validate_file, and no extension blocklist exist anywhere in the upload handler.
Weakness: CWE-434
Which versions are affected by CVE-2026-18933?
How do I fix CVE-2026-18933?
No fix has been published for CVE-2026-18933 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-18933 being exploited?
There is no known exploitation of CVE-2026-18933 in the wild and no public exploit code.
Sources
Also known as GHSA-cc9f-29gq-5x7c.