CVE-2025-6987
📋 TL;DR
The Advanced iFrame WordPress plugin has a stored XSS vulnerability that allows authenticated attackers with contributor-level access or higher to inject malicious scripts into website pages. These scripts execute whenever users visit the compromised pages, potentially stealing credentials or performing unauthorized actions. All WordPress sites using this plugin up to version 2025.5 are affected.
💻 Affected Systems
- Advanced iFrame 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 administrator credentials, take over the WordPress site, deface pages, redirect users to malicious sites, or install backdoors for persistent access.
Likely Case
Attackers with contributor accounts inject malicious scripts to steal user session cookies, perform actions as authenticated users, or display phishing content to visitors.
If Mitigated
With proper user access controls and content security policies, impact is limited to the specific compromised pages and user sessions.
🎯 Exploit Status
Exploitation requires authenticated access but is straightforward once an attacker has contributor privileges. The vulnerability is in publicly accessible code.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Versions after 2025.5
Vendor Advisory: https://plugins.trac.wordpress.org/browser/advanced-iframe/trunk/
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find Advanced iFrame and click 'Update Now'. 4. Verify update completes successfully.
🔧 Temporary Workarounds
Remove Contributor Access
allTemporarily remove contributor-level access from untrusted users to prevent exploitation.
Content Security Policy
allImplement strict CSP headers to limit script execution from untrusted sources.
🧯 If You Can't Patch
- Disable the Advanced iFrame plugin completely
- Implement web application firewall rules to block suspicious iframe parameters
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin → Plugins → Advanced iFrame → Version. If version is 2025.5 or earlier, you are vulnerable.Check Version:
wp plugin get advanced-iframe --field=versionVerify Fix Applied:
After updating, verify the plugin version is higher than 2025.5 in the WordPress plugins page.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to WordPress admin-ajax.php with advanced_iframe parameters
- Multiple failed login attempts followed by successful contributor login
Network Indicators:
- HTTP requests containing malicious script tags in iframe parameters
- Unexpected outbound connections from WordPress site after page visits
SIEM Query:
source="wordpress.log" AND ("advanced_iframe" OR "admin-ajax.php") AND ("script" OR "onload" OR "onerror")🔗 References
- https://plugins.trac.wordpress.org/browser/advanced-iframe/trunk/advanced-iframe.php#L725
- https://plugins.trac.wordpress.org/browser/advanced-iframe/trunk/includes/advanced-iframe-main-iframe.php#L419
- https://plugins.trac.wordpress.org/browser/advanced-iframe/trunk/includes/advanced-iframe-main-read-config.php
- https://plugins.trac.wordpress.org/changeset/3329909/advanced-iframe/trunk/includes/advanced-iframe-main-read-config.php
- https://www.wordfence.com/threat-intel/vulnerabilities/id/6acb99eb-d61c-4d1f-b399-32db07c7e3e7?source=cve
