CVE-2025-3774
📋 TL;DR
The Wise Chat WordPress plugin has a stored XSS vulnerability that allows unauthenticated attackers to inject malicious scripts via the X-Forwarded-For header. These scripts execute whenever users view compromised chat pages, potentially compromising their browsers. All WordPress sites using Wise Chat version 3.3.4 or earlier are affected.
💻 Affected Systems
- Wise Chat WordPress Plugin
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal admin session cookies, redirect users to phishing sites, install malware via drive-by downloads, or perform actions as authenticated users.
Likely Case
Session hijacking, credential theft, defacement of chat pages, or redirection to malicious sites.
If Mitigated
With proper WAF rules and browser security headers, impact is limited to isolated script execution without data exfiltration.
🎯 Exploit Status
Simple HTTP header manipulation required. No authentication needed. Exploit tools likely exist in underground forums.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 3.3.5 or later
Vendor Advisory: https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3200000%40wise-chat&new=3200000%40wise-chat&sfp_email=&sfph_mail=
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find Wise Chat and click 'Update Now'. 4. Verify version is 3.3.5 or higher.
🔧 Temporary Workarounds
WAF Rule for X-Forwarded-For Header
allBlock or sanitize malicious X-Forwarded-For headers at the web application firewall level.
# Cloudflare WAF rule example: (http.request.headers["x-forwarded-for"].contains("<script"))
# ModSecurity rule: SecRule REQUEST_HEADERS:X-Forwarded-For "@rx <script" "id:1001,phase:1,deny"
Disable Wise Chat Plugin
linuxTemporarily disable the plugin until patched.
wp plugin deactivate wise-chat
🧯 If You Can't Patch
- Implement Content Security Policy (CSP) headers to restrict script execution sources.
- Deploy a WAF with XSS protection rules specifically for X-Forwarded-For header.
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > Wise Chat version. If version is 3.3.4 or lower, you are vulnerable.Check Version:
wp plugin get wise-chat --field=versionVerify Fix Applied:
After update, verify version shows 3.3.5 or higher in WordPress plugins list.📡 Detection & Monitoring
Log Indicators:
- HTTP logs showing X-Forwarded-For headers containing script tags or JavaScript code
- Unusual chat entries with encoded payloads
Network Indicators:
- HTTP requests with X-Forwarded-For headers containing <script> tags or JavaScript functions
SIEM Query:
source="web_logs" AND http_header="X-Forwarded-For" AND ("<script" OR "javascript:" OR "onload=" OR "onerror=")