GHSA-WM9P-2XMP-4MP2

Vulnerability from github – Published: 2026-08-15 21:30 – Updated: 2026-08-15 21:30
VLAI
Details

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.

Severity
9.1 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2026-18855"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-22"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-15T19:16:32Z",
    "severity": "CRITICAL"
  },
  "details": "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 \u0027Delete local file on link deletion\u0027 plugin option (disabled by default) and to subsequently permanently delete the attacker-submitted link, which is a routine moderation action.",
  "id": "GHSA-wm9p-2xmp-4mp2",
  "modified": "2026-08-15T21:30:58Z",
  "published": "2026-08-15T21:30:58Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-18855"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/link-library/tags/7.9.4/link-library-admin.php#L7865"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/link-library/tags/7.9.4/link-library-admin.php#L7874"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/link-library/tags/7.9.4/link-library.php#L2288"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/link-library/tags/7.9.4/usersubmission.php#L476"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/link-library/tags/7.9.4/usersubmission.php#L52"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/changeset/3646360/link-library/trunk/link-library-admin.php"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/changeset?old_path=%2Flink-library/tags/7.9.4\u0026new_path=%2Flink-library/tags/7.9.5"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/changeset?reponame=\u0026new=3646361%40link-library%2Ftags%2F7.9.5\u0026old=3626573%40link-library%2Ftags%2F7.9.4"
    },
    {
      "type": "WEB",
      "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/41327dfa-db64-476a-a263-7bd4f69fb857?source=cve"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}



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Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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