{
 "id": "WPSEC-2026-3134",
 "url": "https://wpsec.com/vuln/WPSEC-2026-3134/",
 "json_url": "https://wpsec.com/vuln/WPSEC-2026-3134/advisory.json",
 "markdown_url": "https://wpsec.com/vuln/WPSEC-2026-3134/index.md",
 "title": "Wise Chat <= 3.4.5 - Reflected Cross-Site Scripting via Image Preparation Endpoint",
 "description": "The Wise Chat plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'data' parameter of the wise_chat_prepare_image_endpoint action in all versions up to, and including, 3.4.5, due to insufficient input validation and missing output escaping. The endpoint checked only that the value began with a 'data:image/gif;base64' prefix and then echoed the whole value back in a text/html response, and it had no nonce or XHR request check. This makes it possible for unauthenticated attackers to inject arbitrary web scripts that execute in the browser of a chat user, granted they can trick that user into submitting a forged cross-site request, for example by visiting a malicious page.",
 "plugin": {
  "slug": "wise-chat",
  "name": "Wise Chat",
  "full_name": "Wise Chat",
  "wordpress_org": "https://wordpress.org/plugins/wise-chat/",
  "advisories_url": "https://wpsec.com/vuln/plugin/wise-chat/",
  "attacksurface": "https://attacksurface.wpsec.com/plugin/wise-chat"
 },
 "type": "XSS",
 "cwe": [
  "CWE-79"
 ],
 "cve": [],
 "cvss": {
  "version": "3.1",
  "score": 6.1,
  "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
  "severity": "Medium"
 },
 "affected": {
  "ranges": [
   {
    "from": null,
    "from_inclusive": true,
    "to": "3.4.6",
    "to_inclusive": false
   }
  ],
  "text": [
   "all versions before 3.4.6"
  ]
 },
 "introduced_in": null,
 "fixed_in": "3.4.6",
 "remediation": "Update to 3.4.6 or later.",
 "fix_released": "2026-11-13T09:10:44+00:00",
 "published": "2026-11-14T09:40:51+00:00",
 "updated": "2026-11-13T15:54:13.130986+00:00",
 "also_published_as": null,
 "references": [
  "https://wpsec.com/vuln/WPSEC-2026-3134/",
  "https://plugins.svn.wordpress.org/wise-chat/tags/3.4.6/",
  "https://wordpress.org/plugins/wise-chat/"
 ],
 "attacksurface_url": "https://attacksurface.wpsec.com/plugin/wise-chat",
 "source": "WPSec",
 "license": {
  "name": "CC BY 4.0",
  "url": "https://creativecommons.org/licenses/by/4.0/"
 },
 "usage": {
  "plugin": "Low",
  "affected_versions": "Low",
  "as_of": "2026-11-14"
 }
}