CVE-2024-12422 Overview
CVE-2024-12422 is a reflected Cross-Site Scripting (XSS) vulnerability in the Import Eventbrite Events plugin for WordPress. The flaw affects all versions up to and including 1.7.4. The plugin fails to sanitize input and escape output on the page parameter, allowing unauthenticated attackers to inject arbitrary JavaScript. Successful exploitation requires user interaction, such as clicking a crafted link. Execution occurs in the victim's browser session against the WordPress admin context. The issue is tracked under CWE-79 and was published to the NVD on December 14, 2024.
Critical Impact
An unauthenticated attacker who tricks an administrator into clicking a malicious link can execute arbitrary scripts in the admin's browser, potentially hijacking sessions or performing privileged actions.
Affected Products
- Import Eventbrite Events plugin for WordPress — all versions ≤ 1.7.4
- WordPress sites with the plugin installed and activated
- Administrative users interacting with crafted URLs referencing the plugin's admin pages
Discovery Timeline
- 2024-12-14 - CVE-2024-12422 published to the National Vulnerability Database
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2024-12422
Vulnerability Analysis
The vulnerability is a reflected XSS issue in the plugin's administrative history template. The page query parameter passed to the plugin's admin page is echoed back into HTML output without adequate sanitization or context-aware escaping. An attacker crafts a URL that appends malicious JavaScript to the page value. When an authenticated administrator visits the link, the injected script executes in the browser under the origin of the target WordPress site. Because execution occurs in an authenticated admin context, an attacker can exfiltrate session data, perform CSRF-style actions, or plant a persistent backdoor by modifying plugin or theme code through the admin API.
Root Cause
The root cause is insufficient input sanitization and output escaping in the file templates/admin/import-eventbrite-events-history.php, specifically at lines 16 and 17 of version 1.7.3. The template renders the page request parameter into HTML without applying escaping functions such as esc_attr() or esc_html(). WordPress developer guidance requires escaping untrusted input at the point of output, which the affected template omits.
Attack Vector
Exploitation is network-based and requires user interaction. An attacker constructs a URL pointing to the vulnerable admin page with a payload appended to the page parameter. The attacker delivers the link through phishing, forum posts, or a comment on the target site. When a logged-in administrator clicks the link, the browser sends the request and renders the unescaped payload. The scope change from the vulnerable component to the browser DOM allows the script to interact with the WordPress admin interface. No authentication is required from the attacker to craft or deliver the payload.
Refer to the Wordfence Vulnerability Report and the WordPress Plugin Template History Line 16 for the vulnerable source lines.
Detection Methods for CVE-2024-12422
Indicators of Compromise
- HTTP requests to WordPress admin URLs containing script tags, event handlers such as onerror= or onload=, or encoded JavaScript in the page query parameter.
- Referrer headers pointing to external domains for requests targeting wp-admin/admin.php?page=eventbrite-events-history.
- Unexpected creation or modification of WordPress administrator accounts following admin sessions that clicked external links.
- New or altered plugin or theme files timestamped shortly after suspicious admin traffic.
Detection Strategies
- Inspect web server access logs for query strings on plugin admin pages containing angle brackets, javascript:, or URL-encoded payload markers.
- Deploy a Web Application Firewall (WAF) rule that blocks reflected script patterns in the page parameter on wp-admin routes.
- Enable a Content Security Policy (CSP) that reports script-src violations, providing telemetry on injection attempts.
Monitoring Recommendations
- Alert on WordPress admin sessions initiated immediately after clicks on external referrer URLs containing the plugin's admin route.
- Track integrity of WordPress core, plugin, and theme files using file integrity monitoring and investigate deviations.
- Monitor administrator account changes, new user creation, and modifications to wp_options for signs of post-XSS abuse.
How to Mitigate CVE-2024-12422
Immediate Actions Required
- Update the Import Eventbrite Events plugin to a version above 1.7.4 as soon as the vendor publishes a fixed release.
- Deactivate and remove the plugin if an updated version is not yet available and the functionality is not required.
- Enforce least-privilege for WordPress administrators and require unique, phishing-resistant authentication for admin accounts.
- Educate administrators to avoid clicking untrusted links while logged in to the WordPress admin console.
Patch Information
The vendor addressed the vulnerability through WordPress Plugin Changeset 3207381. Site operators should install the patched release and verify the plugin version in the WordPress admin dashboard after upgrade.
Workarounds
- Restrict access to the WordPress wp-admin directory by IP allowlist at the reverse proxy or WAF.
- Add a WAF rule that blocks requests to plugin admin URLs when the page parameter contains HTML metacharacters.
- Apply a strict Content Security Policy that disallows inline scripts on WordPress admin pages until the patch is applied.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
