{
 "id": "WPSEC-2026-1944",
 "url": "https://wpsec.com/vuln/WPSEC-2026-1944/",
 "json_url": "https://wpsec.com/vuln/WPSEC-2026-1944/advisory.json",
 "markdown_url": "https://wpsec.com/vuln/WPSEC-2026-1944/index.md",
 "title": "Ad Inserter – Ad Manager & AdSense Ads <= 2.8.19 - Authenticated (Contributor+) Stored Cross-Site Scripting via adinserter Shortcode Attribute Placeholders",
 "description": "The Ad Inserter plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the attributes of the 'adinserter' shortcode in all versions up to, and including, 2.8.19. This is due to insufficient output escaping: replace_ai_tags() substitutes shortcode attribute values directly into the {#name#} placeholders of the block code. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts that execute whenever a user accesses an injected page, on sites where a block's code uses such placeholders.",
 "plugin": {
  "slug": "ad-inserter",
  "name": "Ad Inserter – Ad Manager & AdSense Ads",
  "full_name": "Ad Inserter – Ad Manager & AdSense Ads",
  "wordpress_org": "https://wordpress.org/plugins/ad-inserter/",
  "advisories_url": "https://wpsec.com/vuln/plugin/ad-inserter/",
  "attacksurface": "https://attacksurface.wpsec.com/plugin/ad-inserter"
 },
 "type": "XSS",
 "cwe": [
  "CWE-79"
 ],
 "cve": [],
 "cvss": {
  "version": "3.1",
  "score": 4.9,
  "vector": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N",
  "severity": "Medium"
 },
 "affected": {
  "ranges": [
   {
    "from": null,
    "from_inclusive": true,
    "to": "2.8.20",
    "to_inclusive": false
   }
  ],
  "text": [
   "all versions before 2.8.20"
  ]
 },
 "introduced_in": null,
 "fixed_in": "2.8.20",
 "remediation": "Update to 2.8.20 or later.",
 "fix_released": "2026-10-28T10:25:13+00:00",
 "published": "2026-10-29T18:50:39+00:00",
 "updated": "2026-10-29T17:46:46.730215+00:00",
 "also_published_as": null,
 "references": [
  "https://wpsec.com/vuln/WPSEC-2026-1944/",
  "https://plugins.svn.wordpress.org/ad-inserter/tags/2.8.20/",
  "https://wordpress.org/plugins/ad-inserter/"
 ],
 "attacksurface_url": "https://attacksurface.wpsec.com/plugin/ad-inserter",
 "source": "WPSec",
 "license": {
  "name": "CC BY 4.0",
  "url": "https://creativecommons.org/licenses/by/4.0/"
 },
 "usage": {
  "plugin": "Low",
  "affected_versions": "Low",
  "as_of": "2026-10-29"
 }
}