{
 "id": "WPSEC-2026-3104",
 "url": "https://wpsec.com/vuln/WPSEC-2026-3104/",
 "json_url": "https://wpsec.com/vuln/WPSEC-2026-3104/advisory.json",
 "markdown_url": "https://wpsec.com/vuln/WPSEC-2026-3104/index.md",
 "title": "Gutenberg Blocks – PublishPress Blocks Controls, Visibility, Reusable Blocks <= 3.7.6 - Authenticated (Author+) Stored Cross-Site Scripting via Content Display Block Post Text Excerpt",
 "description": "The PublishPress Blocks plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the post text excerpt of the Content Display (Recent Posts) block in all versions up to, and including, 3.7.6. This is due to insufficient output escaping: the advgbExtractHtml() function strips tags from post content and then decodes HTML entities, and the result is printed without 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 a page that shows their published post in a Content Display block.",
 "plugin": {
  "slug": "advanced-gutenberg",
  "name": "Gutenberg Blocks – PublishPress Blocks Controls, Visibility, Reusable Blocks",
  "full_name": "PublishPress Blocks – Block Controls, Block Visibility, Block Permissions",
  "wordpress_org": "https://wordpress.org/plugins/advanced-gutenberg/",
  "advisories_url": "https://wpsec.com/vuln/plugin/advanced-gutenberg/",
  "attacksurface": "https://attacksurface.wpsec.com/plugin/advanced-gutenberg"
 },
 "type": "XSS",
 "cwe": [
  "CWE-79"
 ],
 "cve": [],
 "cvss": {
  "version": "3.1",
  "score": 6.4,
  "vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N",
  "severity": "Medium"
 },
 "affected": {
  "ranges": [
   {
    "from": null,
    "from_inclusive": true,
    "to": "3.7.7",
    "to_inclusive": false
   }
  ],
  "text": [
   "all versions before 3.7.7"
  ]
 },
 "introduced_in": null,
 "fixed_in": "3.7.7",
 "remediation": "Update to 3.7.7 or later.",
 "fix_released": "2026-11-12T19:12:12+00:00",
 "published": "2026-11-13T19:41:14+00:00",
 "updated": "2026-11-13T15:54:44.203516+00:00",
 "also_published_as": null,
 "references": [
  "https://wpsec.com/vuln/WPSEC-2026-3104/",
  "https://plugins.svn.wordpress.org/advanced-gutenberg/tags/3.7.7/",
  "https://wordpress.org/plugins/advanced-gutenberg/"
 ],
 "attacksurface_url": "https://attacksurface.wpsec.com/plugin/advanced-gutenberg",
 "source": "WPSec",
 "license": {
  "name": "CC BY 4.0",
  "url": "https://creativecommons.org/licenses/by/4.0/"
 },
 "usage": {
  "plugin": "Low",
  "affected_versions": "Low",
  "as_of": "2026-11-13"
 }
}