CVE-2026-9239

{
  "id": "CVE-2026-9239",
  "sourceIdentifier": "[email protected]",
  "published": "2026-10-30T18:18:21.613",
  "lastModified": "2026-10-30T19:20:29.180",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "tigroumeow",
          "product": "Meow Gallery",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "0",
              "lessThanOrEqual": "5.5.1",
              "versionType": "semver",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N",
          "baseScore": 6.4,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "CHANGED",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 3.1,
        "impactScore": 2.7
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-10-30T17:33:50.978497Z",
          "id": "CVE-2026-9239",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://plugins.trac.wordpress.org/browser/meow-gallery/tags/5.4.5/classes/core.php#L465",
      "source": "[email protected]"
    },
    {
      "url": "https://plugins.trac.wordpress.org/browser/meow-gallery/tags/5.4.5/classes/core.php#L469",
      "source": "[email protected]"
    },
    {
      "url": "https://plugins.trac.wordpress.org/browser/meow-gallery/tags/5.4.5/classes/run.php#L12",
      "source": "[email protected]"
    },
    {
      "url": "https://plugins.trac.wordpress.org/browser/meow-gallery/tags/5.4.9/classes/core.php#L465",
      "source": "[email protected]"
    },
    {
      "url": "https://plugins.trac.wordpress.org/browser/meow-gallery/tags/5.4.9/classes/core.php#L469",
      "source": "[email protected]"
    },
    {
      "url": "https://plugins.trac.wordpress.org/browser/meow-gallery/tags/5.4.9/classes/run.php#L12",
      "source": "[email protected]"
    },
    {
      "url": "https://plugins.trac.wordpress.org/changeset?old_path=/meow-gallery/tags/5.5.1&new_path=/meow-gallery/tags/5.5.2",
      "source": "[email protected]"
    },
    {
      "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/49afa739-83f0-4ad7-9e5e-d600f293b938?source=cve",
      "source": "[email protected]"
    }
  ]
}