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How CVE-2025-1436 Works
The Limit Bio WordPress plugin (up to v1.0) lacks CSRF protection and input sanitization in its settings update mechanism. Attackers craft a malicious link or form that, when visited by an authenticated admin, injects arbitrary JavaScript (XSS) into the plugin’s stored settings. Since no CSRF token or nonce validation exists, the admin’s session executes the unintended action. The payload then persists, triggering for all visitors via stored XSS.
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Platform: WordPress
Version: ≤1.0
Vulnerability: CSRF→Stored XSS
Severity: Medium
Date: 04/29/2025
What Undercode Say:
Exploit:
1. Craft a CSRF payload:
<form action="http://target/wp-admin/options.php" method="POST"> <input type="hidden" name="limit_bio_field" value="<script>alert(1)</script>"> </form> <script>document.forms[bash].submit()</script>
2. Trick admin into visiting the page.
Protection:
1. Patch: Add nonce checks:
wp_nonce_field('limit_bio_update', '_wpnonce');
2. Sanitize input:
update_option('limit_bio_field', sanitize_text_field($_POST['limit_bio_field']));
3. Escape output:
echo esc_html(get_option('limit_bio_field'));
Detection:
Scan with WPScan:
wpscan --url TARGET --plugins limit-bio --api-token YOUR_TOKEN
Mitigation:
1. Disable plugin if unused.
2. Apply CSP headers:
Header set Content-Security-Policy "default-src 'self'"
Log Analysis:
Monitor Apache logs for suspicious `/wp-admin/options.php` POSTs:
grep "POST /wp-admin/options.php" /var/log/apache2/access.log | grep -v "admin-ajax"
References:
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
