CVE-2024-4543 Overview
CVE-2024-4543 is a Cross-Site Request Forgery (CSRF) vulnerability in the Yeken Snippet Shortcodes plugin for WordPress. The flaw affects all plugin versions up to and including 4.1.4. Missing or incorrect nonce validation in the shortcode add and edit handlers allows unauthenticated attackers to forge requests that modify shortcodes when a site administrator is tricked into clicking a crafted link. The issue is tracked under CWE-352 and was published to the National Vulnerability Database on July 3, 2024.
Critical Impact
An attacker can inject or alter shortcode content across a WordPress site by abusing an authenticated administrator session, enabling persistent modification of front-end output.
Affected Products
- Yeken Snippet Shortcodes plugin for WordPress, versions <= 4.1.4
- WordPress sites with the plugin activated and administrators reachable via web browsing
- Any downstream site content generated from plugin-managed shortcodes
Discovery Timeline
- 2024-07-03 - CVE-2024-4543 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2024-4543
Vulnerability Analysis
The Snippet Shortcodes plugin exposes administrative actions for creating and editing shortcodes without validating a WordPress nonce on the request. WordPress nonces are the standard mechanism to bind a state-changing request to the current authenticated user session. Without this check, the plugin cannot distinguish between an intentional administrator submission and a forged cross-origin request. An attacker who convinces an authenticated administrator to visit a hostile page can trigger arbitrary shortcode modifications using the administrator's browser session. User interaction is required, which lowers the exploitability profile but does not eliminate the risk in phishing scenarios.
Root Cause
The root cause is missing or incorrect nonce validation in the shortcode add and edit handlers, classified as CWE-352 Cross-Site Request Forgery. The endpoints rely on the administrator's authenticated cookie session but do not verify a wp_nonce token bound to the intended form or action.
Attack Vector
Exploitation requires the attacker to host a malicious page containing an auto-submitting form or crafted request that targets the plugin's shortcode management endpoint. When a logged-in WordPress administrator loads the page, the browser sends the request with valid authentication cookies. The plugin processes the request as if it originated from the administrator interface. The vulnerability is network reachable, requires no privileges from the attacker, and depends on user interaction.
No verified proof-of-concept code is available. Refer to the Wordfence Vulnerability Report for additional technical context.
Detection Methods for CVE-2024-4543
Indicators of Compromise
- Unexpected creation, modification, or deletion of shortcodes in the plugin's admin interface outside of scheduled change windows.
- WordPress access logs showing POST requests to plugin shortcode endpoints with Referer headers pointing to external or unknown domains.
- Administrator sessions triggering shortcode changes immediately after visiting an external link or email-delivered URL.
Detection Strategies
- Audit the WordPress database tables managed by the plugin for shortcode entries whose modification timestamps do not correlate with authorized administrator activity.
- Inspect web server and reverse proxy logs for cross-origin POST requests targeting wp-admin endpoints associated with the Snippet Shortcodes plugin.
- Compare the currently installed plugin version against the fixed release; any version <= 4.1.4 should be treated as vulnerable.
Monitoring Recommendations
- Enable WordPress activity logging to record shortcode changes with the acting user, source IP, and request headers.
- Alert on rendered site content containing unexpected inline scripts, iframes, or redirects introduced through shortcode output.
- Monitor administrator accounts for browsing telemetry that precedes plugin configuration changes.
How to Mitigate CVE-2024-4543
Immediate Actions Required
- Update the Snippet Shortcodes plugin to a version released after 4.1.4 that includes the fix from WordPress plugin changeset 3110951.
- If a fixed version is not available or cannot be installed, deactivate and remove the plugin until it can be patched.
- Review all existing shortcodes for unauthorized modifications and restore known-good content from backups where necessary.
Patch Information
The vendor addressed the missing nonce validation in WordPress plugin changeset 3110951. Administrators should upgrade to a release that incorporates this changeset. Additional vendor and third-party detail is available in the Wordfence Vulnerability Report.
Workarounds
- Restrict administrator access to WordPress dashboards from known IP ranges through a web application firewall or reverse proxy allowlist.
- Require administrators to use isolated browser profiles for WordPress administration to reduce exposure to cross-site request forgery from unrelated browsing activity.
- Enforce short WordPress session lifetimes and re-authentication for privileged actions to shrink the window in which a forged request can succeed.
# Verify installed plugin version on a WordPress host using WP-CLI
wp plugin get snippet-shortcodes --field=version
# Upgrade the plugin to the latest available release
wp plugin update snippet-shortcodes
# If no fixed release is available, deactivate the plugin
wp plugin deactivate snippet-shortcodes
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
