CVE-2025-39543
📋 TL;DR
This stored cross-site scripting (XSS) vulnerability in the Royal Elementor Addons WordPress plugin allows attackers to inject malicious scripts into web pages. When users view pages containing the malicious content, the scripts execute in their browsers, potentially stealing credentials or performing unauthorized actions. All WordPress sites using vulnerable versions of Royal Elementor Addons are affected.
💻 Affected Systems
- Royal Elementor Addons 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 session cookies, take over WordPress sites, deface websites, or redirect visitors to malicious sites, potentially leading to complete site compromise and data theft.
Likely Case
Attackers inject malicious JavaScript that steals user session cookies or credentials when users visit compromised pages, leading to account takeover and unauthorized access.
If Mitigated
With proper input validation and output encoding, malicious scripts would be neutralized before reaching users' browsers, preventing execution.
🎯 Exploit Status
Stored XSS vulnerabilities are commonly exploited. While no public PoC is confirmed, the vulnerability type is well-understood and weaponization is likely.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.3.978 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find 'Royal Elementor Addons' and click 'Update Now'. 4. Verify the plugin version is 1.3.978 or higher.
🔧 Temporary Workarounds
Disable Royal Elementor Addons Plugin
allTemporarily disable the vulnerable plugin until patching is possible
wp plugin deactivate royal-elementor-addons
Implement Content Security Policy (CSP)
allAdd CSP headers to restrict script execution sources
Add to .htaccess: Header set Content-Security-Policy "default-src 'self'; script-src 'self'"
Or add to wp-config.php: header("Content-Security-Policy: default-src 'self'; script-src 'self'");
🧯 If You Can't Patch
- Disable the Royal Elementor Addons plugin immediately
- Implement web application firewall (WAF) rules to block XSS payloads
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin → Plugins → Installed Plugins for Royal Elementor Addons version. If version is 1.3.977 or lower, you are vulnerable.Check Version:
wp plugin get royal-elementor-addons --field=versionVerify Fix Applied:
After updating, verify the plugin shows version 1.3.978 or higher in WordPress admin → Plugins → Installed Plugins.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to WordPress admin-ajax.php or admin-post.php containing script tags
- Multiple failed login attempts following suspicious page views
- Unexpected modifications to page content in database
Network Indicators:
- HTTP requests containing <script> tags in parameters
- Outbound connections to suspicious domains from WordPress pages
- Unusual JavaScript execution patterns
SIEM Query:
source="wordpress.log" AND ("<script>" OR "javascript:" OR "onload=" OR "onerror=")