{
 "id": "WPSEC-2026-1081",
 "url": "https://wpsec.com/vuln/WPSEC-2026-1081/",
 "json_url": "https://wpsec.com/vuln/WPSEC-2026-1081/advisory.json",
 "markdown_url": "https://wpsec.com/vuln/WPSEC-2026-1081/index.md",
 "title": "Nexter Extension <= 4.7.12 - Authenticated (Author+) Missing Authorization to Image Conversion and Overwrite via Image Optimisation",
 "description": "The Nexter Extension plugin for WordPress is vulnerable to unauthorized modification of data via the Image Optimisation 'nxt_ext_image_convert_attachment' AJAX action in versions 4.6.0 to 4.7.12. This is due to the function checking only the upload_files capability and not checking that the user may edit the attachment being converted. This makes it possible for authenticated attackers with Author-level access and above to convert media library images that belong to other users, which replaces the files served for those images and rewrites their attachment metadata.",
 "plugin": {
  "slug": "nexter-extension",
  "name": "Nexter Extension",
  "full_name": "Nexter Extension – Security, Performance, Code Snippets & Site Toolkit",
  "wordpress_org": "https://wordpress.org/plugins/nexter-extension/",
  "advisories_url": "https://wpsec.com/vuln/plugin/nexter-extension/",
  "attacksurface": "https://attacksurface.wpsec.com/plugin/nexter-extension"
 },
 "type": "NO AUTHORISATION",
 "cwe": [
  "CWE-862"
 ],
 "cve": [],
 "cvss": {
  "version": "3.1",
  "score": 4.3,
  "vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
  "severity": "Medium"
 },
 "affected": {
  "ranges": [
   {
    "from": "4.6.0",
    "from_inclusive": true,
    "to": "4.7.13",
    "to_inclusive": false
   }
  ],
  "text": [
   "from 4.6.0 before 4.7.13"
  ]
 },
 "introduced_in": "4.6.0",
 "fixed_in": "4.7.13",
 "remediation": "Update to 4.7.13 or later.",
 "fix_released": "2026-10-15T10:46:30+00:00",
 "published": "2026-10-16T11:46:25+00:00",
 "updated": "2026-10-16T10:56:21.544826+00:00",
 "also_published_as": null,
 "references": [
  "https://wpsec.com/vuln/WPSEC-2026-1081/",
  "https://plugins.svn.wordpress.org/nexter-extension/tags/4.7.13/",
  "https://wordpress.org/plugins/nexter-extension/"
 ],
 "attacksurface_url": "https://attacksurface.wpsec.com/plugin/nexter-extension",
 "source": "WPSec",
 "license": {
  "name": "CC BY 4.0",
  "url": "https://creativecommons.org/licenses/by/4.0/"
 },
 "usage": {
  "plugin": "Low",
  "affected_versions": "None seen",
  "as_of": "2026-10-16"
 }
}