CVE-2026-3643

HIGH EPSS 32.8%
Published Apr 15, 20262mo ago · Modified Jun 17, 20262w ago
7.2 CVSS 3.1
High
Find Similar
Published Apr 15, 2026 2mo ago
Last Modified Jun 17, 2026 2w ago

Description

The Accessibly plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the REST API in all versions up to, and including, 3.0.3. The plugin registers REST API endpoints at `/otm-ac/v1/update-widget-options` and `/otm-ac/v1/update-app-config` with the `permission_callback` set to `__return_true`, which means no authentication or authorization check is performed. The `updateWidgetOptions()` function in `AdminApi.php` accepts user-supplied JSON data and passes it directly to `AccessiblyOptions::updateAppConfig()`, which saves it to the WordPress options table via `update_option()` without any sanitization or validation. The stored `widgetSrc` value is later retrieved by `AssetsManager::enqueueFrontendScripts()` and passed directly to `wp_enqueue_script()` as the script URL, causing it to be rendered as a `<script>` tag on every front-end page. This makes it possible for unauthenticated attackers to inject arbitrary JavaScript that executes for all site visitors by changing the `widgetSrc` option to point to a malicious external script.

CVSS Details

Base Score
7.2
Exploitability
3.9
Impact
2.7
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Changed
Confidentiality Low
Integrity Low
Availability None

Threat Intelligence

EPSS Exploit Probability
32.8% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-79 Cross-site Scripting Injection

References 9

  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/otm-accessibly/tags/3.0.3/public/Api/BaseApiController.php#L22
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/otm-accessibly/tags/3.0.3/public/AssetsManager.php#L63
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/otm-accessibly/tags/3.0.3/public/Data/AccessiblyOptions.php#L69
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/otm-accessibly/tags/3.0.3/public/admin/AdminApi.php#L65
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/otm-accessibly/trunk/public/Api/BaseApiController.php#L22
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/otm-accessibly/trunk/public/AssetsManager.php#L63
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/otm-accessibly/trunk/public/Data/AccessiblyOptions.php#L69
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/otm-accessibly/trunk/public/admin/AdminApi.php#L65
  • wordfence.com https://www.wordfence.com/threat-intel/vulnerabilities/id/f8234ea2-ff80-425f-b83d-29c422b40c6a?source=cve

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.