GHSA-93VW-W9VM-PP4X

Vulnerability from github – Published: 2026-10-30 18:32 – Updated: 2026-10-30 18:32
VLAI
Details

The Meow Gallery plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Attachment Alt Text (aria-label attribute) in all versions up to, and including, 5.5.1 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with author-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The vulnerable code path is only reachable when a gallery item is rendered as a link (i.e., link_href is non-empty), and exploitation relies on the fact that WordPress's sanitize_text_field() strips angle-bracketed tags but preserves double quotes, allowing an attacker to break out of the aria-label attribute context and inject event-handler attributes such as onclick.

Severity
6.4 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Show details on source website
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{
  "affected": [],
  "aliases": [
    "CVE-2026-9239"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-30T18:18:21Z",
    "severity": "MODERATE"
  },
  "details": "The Meow Gallery plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Attachment Alt Text (aria-label attribute) in all versions up to, and including, 5.5.1 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with author-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The vulnerable code path is only reachable when a gallery item is rendered as a link (i.e., link_href is non-empty), and exploitation relies on the fact that WordPress\u0027s sanitize_text_field() strips angle-bracketed tags but preserves double quotes, allowing an attacker to break out of the aria-label attribute context and inject event-handler attributes such as onclick.",
  "id": "GHSA-93vw-w9vm-pp4x",
  "modified": "2026-10-30T18:32:46Z",
  "published": "2026-10-30T18:32:46Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-9239"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/meow-gallery/tags/5.4.5/classes/core.php#L465"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/meow-gallery/tags/5.4.5/classes/core.php#L469"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/meow-gallery/tags/5.4.5/classes/run.php#L12"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/meow-gallery/tags/5.4.9/classes/core.php#L465"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/meow-gallery/tags/5.4.9/classes/core.php#L469"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/meow-gallery/tags/5.4.9/classes/run.php#L12"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/changeset?old_path=/meow-gallery/tags/5.5.1\u0026new_path=/meow-gallery/tags/5.5.2"
    },
    {
      "type": "WEB",
      "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/49afa739-83f0-4ad7-9e5e-d600f293b938?source=cve"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}



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