---
id: CVE-2026-18855
title: >-
  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
  unauthen…
summary: >-
  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
  unauthen…
severity: critical
cvss: 9.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H'
cwe:
  - CWE-22
published: '2026-08-15'
updated: '2026-08-15'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-18855'
references:
  - url: >-
      https://plugins.trac.wordpress.org/browser/link-library/tags/7.9.4/link-library-admin.php#L7865
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/link-library/tags/7.9.4/link-library-admin.php#L7874
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/link-library/tags/7.9.4/link-library.php#L2288
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/link-library/tags/7.9.4/usersubmission.php#L476
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/link-library/tags/7.9.4/usersubmission.php#L52
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/changeset/3646360/link-library/trunk/link-library-admin.php
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/changeset?old_path=%2Flink-library/tags/7.9.4&new_path=%2Flink-library/tags/7.9.5
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/changeset?reponame=&new=3646361%40link-library%2Ftags%2F7.9.5&old=3626573%40link-library%2Ftags%2F7.9.4
    label: security@wordfence.com
  - url: >-
      https://www.wordfence.com/threat-intel/vulnerabilities/id/41327dfa-db64-476a-a263-7bd4f69fb857?source=cve
    label: security@wordfence.com
tags:
  - nvd
ingestedAt: '2026-08-16T13:39:03.668Z'
epss: 0.01352
epssPercentile: 0.70327
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.