CVE-2026-18855 Link Library <= 7.9.4 - Unauthenticated Arbitrary File Deletion via link_url Parameter
Unauthenticated attackers can delete arbitrary files, potentially leading to remote code execution, if a specific plugin option is enabled and links are deleted.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-18855?
CVE-2026-18855 is a critical path traversal vulnerability in jackdewey Link Library, published on 15 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The Link Library plugin for WordPress is vulnerable to arbitrary file deletion due to insufficient file path validation in the ll_delete_link_fields function in all versions up to, and including, 7.9.4 This makes it possible for unauthenticated attackers to delete arbitrary files on the server, which can easily lead to remote code execution when the right file is deleted (such as wp-config.php). Exploitation requires the administrator to have enabled the 'Delete local file on link deletion' plugin option (disabled by default) and to subsequently permanently delete the attacker-submitted link, which is a routine moderation action.
Weakness: CWE-22
Which versions are affected by CVE-2026-18855?
How do I fix CVE-2026-18855?
No fix has been published for CVE-2026-18855 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-2026-18855 being exploited?
There is no known exploitation of CVE-2026-18855 in the wild and no public exploit code.
Sources
Also known as GHSA-wm9p-2xmp-4mp2.