jackdewey Link Library Plugin up to 7.9.4 on WordPress ll_delete_link_fields path traversal

Summaryinfo

A vulnerability identified as problematic has been detected in jackdewey Link Library Plugin up to 7.9.4. The impacted element is the function ll_delete_link_fields. This manipulation causes path traversal. This vulnerability is tracked as CVE-2026-18855. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability was found in jackdewey Link Library Plugin up to 7.9.4. It has been declared as problematic. Affected by this vulnerability is the function ll_delete_link_fields. The manipulation with an unknown input leads to a path traversal vulnerability. The CWE definition for the vulnerability is CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

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.

The advisory is shared at wordfence.com. This vulnerability is known as CVE-2026-18855 since 08/04/2026. The exploitation appears to be easy. The attack can be launched remotely. Additional levels of successful authentication are required for exploitation. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/15/2026). MITRE ATT&CK project uses the attack technique T1006 for this issue.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-59784). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• WordPress Plugin

Vendor

• jackdewey

Name

• Link Library Plugin

Version

• 7.9.0
• 7.9.1
• 7.9.2
• 7.9.3
• 7.9.4

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
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• 🔒

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Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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