GHSA-4689-RGVQ-62R3

Vulnerability from github – Published: 2026-07-03 06:32 – Updated: 2026-07-03 06:32
VLAI
Details

The JSON API User plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'content' parameter of the post_comment API endpoint in versions up to, and including, 4.1.0 This is due to insufficient input sanitization in the post_comment() function, which passes the attacker-controlled comment_content value directly to wp_insert_comment() without applying any HTML sanitization, and additionally allows the caller to set comment_approved=1 to self-approve the comment and bypass moderation. This makes it possible for authenticated attackers, with subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Severity
6.4 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
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{
  "affected": [],
  "aliases": [
    "CVE-2026-9626"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-03T06:16:23Z",
    "severity": "MODERATE"
  },
  "details": "The JSON API User plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the \u0027content\u0027 parameter of the post_comment API endpoint in versions up to, and including, 4.1.0 This is due to insufficient input sanitization in the post_comment() function, which passes the attacker-controlled comment_content value directly to wp_insert_comment() without applying any HTML sanitization, and additionally allows the caller to set comment_approved=1 to self-approve the comment and bypass moderation. This makes it possible for authenticated attackers, with subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.",
  "id": "GHSA-4689-rgvq-62r3",
  "modified": "2026-07-03T06:32:07Z",
  "published": "2026-07-03T06:32:07Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-9626"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/json-api-user/tags/4.1.0/controllers/User.php#L1007"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/json-api-user/tags/4.1.0/controllers/User.php#L979"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/json-api-user/tags/4.1.0/controllers/User.php#L995"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/changeset/3576431/json-api-user/trunk/controllers/User.php"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/changeset?old_path=%2Fjson-api-user/tags/4.1.0\u0026new_path=%2Fjson-api-user/tags/4.1.2"
    },
    {
      "type": "WEB",
      "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/c41b0370-2881-4053-98b1-9c70251a3b63?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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  • 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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