CVE-2024-31109: WooCommerce Social Media CSRF Vulnerability

CVE-2024-31109 Overview

CVE-2024-31109 is a Cross-Site Request Forgery (CSRF) vulnerability in the Toastie Studio Woocommerce Social Media Share Buttons plugin for WordPress. The flaw affects all plugin versions up to and including 1.3.0. An attacker can chain the CSRF weakness with Stored Cross-Site Scripting (XSS) to inject persistent malicious scripts into the WordPress administrative interface. Exploitation requires an authenticated administrator to interact with attacker-controlled content, such as a crafted link or web page. Successful attacks execute arbitrary JavaScript in the victim's browser session under the WordPress site's origin.

Critical Impact

Successful exploitation results in persistent JavaScript injection executed under administrator context, enabling session theft, configuration tampering, and further site compromise.

Affected Products

• Toastie Studio Woocommerce Social Media Share Buttons plugin for WordPress
• All versions from initial release through 1.3.0
• WordPress installations running WooCommerce with this plugin enabled

Discovery Timeline

• 2024-04-02 - CVE-2024-31109 published to NVD
• 2026-04-28 - Last updated in NVD database

Technical Details for CVE-2024-31109

Vulnerability Analysis

The vulnerability is classified under [CWE-352] Cross-Site Request Forgery. The plugin's administrative endpoints accept state-changing requests without verifying a valid WordPress nonce or other anti-CSRF token. An attacker who lures an authenticated administrator to a malicious page can trigger forged requests that update plugin settings. Because those settings are rendered without sufficient output encoding, attacker-supplied payloads persist as Stored XSS. The injected JavaScript then executes whenever an administrator loads the affected page.

Root Cause

The root cause is missing CSRF protection on the plugin's settings submission handlers. The handlers do not validate WordPress nonces using check_admin_referer() or wp_verify_nonce(). Compounding the issue, user-controlled input persisted by these handlers is reflected back into administrative pages without contextual escaping such as esc_attr() or esc_html().

Attack Vector

An attacker hosts a malicious page containing a hidden form or JavaScript that submits a crafted request to the vulnerable plugin endpoint. The attacker delivers the link to an authenticated WordPress administrator through phishing or social media. When the administrator visits the page, the browser submits the forged request with valid session cookies. The payload is stored in the plugin configuration and executes when any administrator views the affected settings page.

No verified public proof-of-concept code is available. Refer to the Patchstack Vulnerability Advisory for additional technical context.

Detection Methods for CVE-2024-31109

Indicators of Compromise

• Unexpected <script> tags or JavaScript event handlers stored in WooCommerce Social Media Share Buttons plugin options within the wp_options table
• Administrator browser sessions making outbound requests to unfamiliar domains after visiting plugin settings pages
• Modifications to plugin settings without corresponding entries in administrator activity logs

Detection Strategies

• Audit wp_options rows associated with the plugin for HTML or JavaScript content that should not appear in configuration fields
• Inspect web server access logs for POST requests to plugin admin endpoints originating from external Referer headers
• Review WordPress audit logs for plugin setting changes that lack a preceding authenticated admin page view

Monitoring Recommendations

• Monitor administrator user agents for anomalous JavaScript execution patterns on /wp-admin/ pages
• Alert on plugin configuration changes outside normal administrative hours
• Track outbound HTTP requests from administrator browsers to non-allowlisted domains following WordPress admin sessions

How to Mitigate CVE-2024-31109

Immediate Actions Required

• Update the Woocommerce Social Media Share Buttons plugin to a version newer than 1.3.0 if a patched release is available, or deactivate and remove the plugin
• Review plugin settings for unauthorized script content and restore known-good configuration values
• Force password resets and session invalidation for all WordPress administrator accounts if compromise is suspected

Patch Information

No confirmed patched version is referenced in the available advisory data. Administrators should consult the Patchstack Vulnerability Advisory and the plugin vendor for current remediation status.

Workarounds

• Deactivate the plugin until a verified patched release is published by Toastie Studio
• Deploy a web application firewall rule that requires a valid WordPress nonce on plugin admin POST endpoints
• Restrict /wp-admin/ access by IP allowlist to reduce exposure to CSRF lures delivered through phishing
• Enforce a strict Content Security Policy on WordPress admin pages to limit inline script execution

# Disable the vulnerable plugin via WP-CLI
wp plugin deactivate woocommerce-social-media-share-buttons
wp plugin delete woocommerce-social-media-share-buttons