EUVD-2026-51096
GHSA-hj2v-9cpv-vv4f
Severity by source
AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Network-reachable CSRF requiring admin click (UI:R); no privileges needed; only sync-rule state toggled, so I:L, C:N, A:N.
Primary rating from Vendor (wordfence).
CVSS VectorVendor: wordfence
Lifecycle Timeline
2DescriptionCVE.org
The FuseWP plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 1.1.24.2. This is due to missing nonce verification on the toggle_sync_status() function. This makes it possible for unauthenticated attackers to toggle the status of sync rules (enable/disable) via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.
AnalysisAI
Cross-Site Request Forgery in the FuseWP WordPress plugin (all versions ≤ 1.1.24.2) allows unauthenticated attackers to toggle email-marketing sync rule states by tricking an authenticated administrator into triggering a forged request. The root cause is missing nonce verification on the toggle_sync_status() AJAX handler in AjaxHandler.php (line 149), meaning WordPress's built-in CSRF protection is entirely absent for that state-changing action. No public exploit or active exploitation (CISA KEV) has been identified at time of analysis; CVSS 4.3 Medium correctly reflects the limited impact scope - the attacker can only enable or disable sync rules, not read data or execute code.
Technical ContextAI
FuseWP is a WordPress plugin that synchronizes WordPress users with external email marketing and CRM platforms. WordPress protects AJAX-driven state changes through nonce tokens, which the server validates to ensure the request originated from a legitimate on-site form rather than a forged cross-origin request. The vulnerable function toggle_sync_status() in src/core/src/AjaxHandler.php at line 149 omits this nonce check entirely (CWE-352: Cross-Site Request Forgery), leaving the sync-rule enable/disable endpoint open to forged POST or GET requests. Because WordPress AJAX endpoints are reachable at /wp-admin/admin-ajax.php and the browser automatically includes session cookies, any page the administrator visits can silently submit a qualifying request. The changeset diff between revisions 3172907 and 3505110 confirms where the fix was applied.
RemediationAI
The WordPress.org repository changeset 3505110 (https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&new=3505110@fusewp/trunk/src/core/src/AjaxHandler.php&old=3172907@fusewp/trunk/src/core/src/AjaxHandler.php) confirms a fix was committed to trunk; however, the specific patched release version number is not independently confirmed from available data - administrators should update to the latest version available on https://wordpress.org/plugins/fusewp/ and verify it is newer than 1.1.24.2. As a compensating control where immediate update is not possible, restricting administrator accounts to accessing the WordPress dashboard only from known-safe networks reduces the social engineering attack surface. Web Application Firewall rules that block cross-origin requests to /wp-admin/admin-ajax.php targeting the FuseWP action can also mitigate the specific attack vector, though with a risk of false positives on legitimate AJAX usage.
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Same weakness CWE-352 – Cross-Site Request Forgery (CSRF)
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External POC / Exploit Code
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