CVE-2025-30586: cTabs Plugin CSRF Vulnerability

CVE-2025-30586 Overview

CVE-2025-30586 is a Cross-Site Request Forgery [CWE-352] vulnerability in the bbodine1 cTabs WordPress plugin that enables Stored Cross-Site Scripting (XSS). The flaw affects all cTabs versions up to and including 1.3. An attacker can craft a malicious page that, when visited by an authenticated administrator, submits a forged request to the plugin and stores attacker-controlled JavaScript within plugin data. The script then executes in the browser of any user who loads the affected page.

Critical Impact

Successful exploitation lets an unauthenticated attacker plant persistent JavaScript in a WordPress site by tricking an authenticated user into visiting a malicious page, leading to session theft, account takeover, or further site compromise.

Affected Products

• bbodine1 cTabs WordPress plugin versions through 1.3
• WordPress installations with cTabs active
• Administrator sessions interacting with the vulnerable plugin endpoints

Discovery Timeline

• 2025-03-24 - CVE-2025-30586 published to NVD
• 2026-04-23 - Last updated in NVD database

Technical Details for CVE-2025-30586

Vulnerability Analysis

The vulnerability combines two weaknesses: missing CSRF protection on state-changing plugin actions and insufficient output encoding for user-supplied content. The plugin handler that saves tab content lacks a valid WordPress nonce check, so requests originating from third-party origins are processed as if initiated by the logged-in administrator. Stored values are later rendered without proper escaping, allowing injected <script> payloads to execute in the browser context of any visitor.

The attack vector is network-based and requires user interaction from an authenticated administrator. The scope changes because injected scripts execute in the trust boundary of any browser that loads the affected WordPress page, including other administrators.

Root Cause

The root cause is the absence of anti-CSRF tokens on plugin form submissions handled by cTabs. WordPress provides wp_nonce_field() and check_admin_referer() to bind requests to a user session, but the plugin does not validate these tokens on the affected save action. Combined with missing sanitization through functions such as wp_kses_post() or esc_html(), attacker-controlled markup persists in the database and is echoed back as executable script.

Attack Vector

An attacker hosts a page containing a hidden form that auto-submits to the vulnerable WordPress endpoint, for example the cTabs settings or tab-content save handler. The form fields include malicious HTML and JavaScript payloads in the tab content parameter. When a logged-in WordPress administrator visits the attacker's page, the browser submits the request with valid authentication cookies. The plugin stores the payload, and every subsequent render of the affected tab triggers execution of the injected script.

No verified public proof-of-concept code is available. See the Patchstack Vulnerability Report for additional technical context.

Detection Methods for CVE-2025-30586

Indicators of Compromise

• Unexpected <script>, <iframe>, or event-handler attributes stored within cTabs tab content in the WordPress wp_options or plugin-specific tables.
• WordPress access logs showing POST requests to cTabs admin handlers with Referer headers pointing to external domains.
• New or modified administrator accounts and altered theme or plugin files following an administrator visit to an untrusted site.

Detection Strategies

• Audit the WordPress database for cTabs records containing HTML tags, javascript: URIs, or encoded script payloads.
• Inspect rendered pages for unexpected outbound network requests or DOM elements not configured by site administrators.
• Correlate admin authentication events with cross-origin POST requests to wp-admin endpoints lacking a valid nonce parameter.

Monitoring Recommendations

• Enable a web application firewall rule set that blocks cross-origin POSTs to wp-admin without matching nonce values.
• Log and alert on changes to plugin configuration tables and option records associated with cTabs.
• Monitor administrator browser sessions for anomalous JavaScript activity and content-security-policy violations.

How to Mitigate CVE-2025-30586

Immediate Actions Required

• Deactivate the cTabs plugin until a patched version is installed, since the latest affected release is 1.3.
• Force a password reset and session invalidation for all WordPress administrator accounts that may have interacted with the plugin.
• Review and remove any suspicious markup stored in cTabs tab content fields.

Patch Information

No fixed version is identified in the available advisory. Consult the Patchstack Vulnerability Report for current remediation status and apply any vendor update as soon as it becomes available.

Workarounds

• Restrict wp-admin access to known IP ranges via web server or firewall rules to reduce CSRF reachability.
• Deploy a Content Security Policy that disallows inline scripts on WordPress admin and public pages rendering tab content.
• Require administrators to use a dedicated browser profile for WordPress management to limit cross-site request exposure.

# Disable the vulnerable plugin via WP-CLI until a fix is available
wp plugin deactivate ctabs
wp plugin status ctabs