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
Show details on source website
To clipboard 

{
  "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"
    }
  ]
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.