CVE-2024-13494 Overview
CVE-2024-13494 is a Cross-Site Request Forgery (CSRF) vulnerability affecting the WordPress File Upload plugin developed by Iptanus. The flaw exists in all versions up to and including 4.25.2. The root cause is missing or incorrect nonce validation on the wfu_file_details function. Unauthenticated attackers can modify user data details associated with uploaded files by tricking a site administrator into clicking a crafted link. The vulnerability is classified under CWE-352 and requires user interaction to succeed.
Critical Impact
Successful exploitation allows unauthenticated attackers to tamper with metadata of uploaded files on affected WordPress sites, provided an administrator is tricked into performing an action such as clicking a malicious link.
Affected Products
- Iptanus WordPress File Upload plugin versions up to and including 4.25.2
- WordPress sites with the vulnerable plugin activated
- All hosting environments running the affected plugin version
Discovery Timeline
- 2025-02-25 - CVE-2024-13494 published to the National Vulnerability Database
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2024-13494
Vulnerability Analysis
The WordPress File Upload plugin exposes a function named wfu_file_details that handles modifications to metadata associated with uploaded files. This function does not enforce proper anti-CSRF nonce validation, which WordPress uses to confirm the origin of state-changing requests. Without this check, the plugin accepts requests that originate from external sites as if they came from an authenticated administrator session.
An attacker can craft a page or link that issues a request to the vulnerable endpoint. When an authenticated administrator visits the attacker-controlled page, the browser automatically attaches session cookies, and the request executes with administrative privileges.
The vulnerability does not permit disclosure of confidential data or denial of service, but it does allow tampering with file metadata stored by the plugin.
Root Cause
The root cause is the absence or incorrect application of WordPress nonce validation on the wfu_file_details handler. WordPress developers are expected to call functions such as check_admin_referer() or wp_verify_nonce() before processing sensitive state changes. The vulnerable versions of the plugin omit this check, leaving the endpoint reachable through forged cross-origin requests.
Attack Vector
Exploitation requires an unauthenticated attacker to prepare a malicious web page containing a forged request to the vulnerable WordPress site. The attacker then lures an authenticated administrator into visiting that page or clicking a link. The administrator's browser submits the request with valid session cookies, and the plugin processes the modification. No credentials, authentication tokens, or prior access to the target site are required from the attacker.
Refer to the Wordfence Vulnerability Report for additional technical context on the affected handler.
Detection Methods for CVE-2024-13494
Indicators of Compromise
- Unexpected modifications to file metadata records maintained by the WordPress File Upload plugin
- Web server access logs showing requests to wfu_file_details with Referer headers pointing to unfamiliar external domains
- Administrator sessions submitting POST requests that lack the plugin's expected nonce parameter
Detection Strategies
- Inspect HTTP access logs for cross-origin requests targeting endpoints associated with the wfu_file_details function
- Compare current plugin file metadata against known-good backups to identify unauthorized changes
- Deploy a Web Application Firewall (WAF) rule that inspects and rejects requests to the vulnerable endpoint that lack a valid WordPress nonce
Monitoring Recommendations
- Enable WordPress audit logging to record administrator actions and detect anomalous file metadata changes
- Alert on outbound clicks from administrator accounts to unknown domains followed by state-changing requests to /wp-admin/
- Monitor plugin update channels for advisories from Iptanus and vulnerability databases such as Wordfence
How to Mitigate CVE-2024-13494
Immediate Actions Required
- Upgrade the WordPress File Upload plugin to a version later than 4.25.2 that includes the nonce validation fix
- Restrict administrator browsing activity to trusted resources while the site is being remediated
- Review file metadata records maintained by the plugin for unauthorized modifications and restore from backup where required
Patch Information
The vendor addressed the issue in a subsequent plugin release. Details of the code change are available in the WordPress Plugin Changeset. Administrators should apply the update through the WordPress plugin management interface or by deploying the patched plugin files directly.
Workarounds
- Temporarily deactivate the WordPress File Upload plugin until the update can be applied
- Enforce a WAF rule that blocks requests to the wfu_file_details endpoint from external referrers
- Require administrators to use dedicated browser profiles for WordPress administration to reduce exposure to CSRF lures
# Configuration example
# Update the WordPress File Upload plugin using WP-CLI
wp plugin update wp-file-upload
# Verify installed version is greater than 4.25.2
wp plugin get wp-file-upload --field=version
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
