CVE-2025-23818
📋 TL;DR
This Cross-Site Request Forgery (CSRF) vulnerability in the WordPress More Link Modifier plugin allows attackers to trick authenticated administrators into performing actions that inject malicious scripts. When exploited, it leads to stored cross-site scripting (XSS) attacks. WordPress sites using vulnerable versions of this plugin are affected.
💻 Affected Systems
- WordPress More Link Modifier 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 inject persistent malicious scripts that steal administrator credentials, hijack sessions, deface websites, or redirect visitors to malicious sites.
Likely Case
Attackers create fake admin interfaces or forms that trick logged-in administrators into executing actions that inject malicious JavaScript payloads into the site.
If Mitigated
With proper CSRF tokens and input validation, the vulnerability would be prevented even if administrators are tricked into clicking malicious links.
🎯 Exploit Status
Exploitation requires social engineering to trick an authenticated administrator into clicking a malicious link or visiting a crafted page.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Versions after 1.0.3
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find 'More Link Modifier' plugin. 4. Click 'Update Now' if update available. 5. If no update available, deactivate and delete the plugin.
🔧 Temporary Workarounds
Implement CSRF Protection
allAdd CSRF tokens to all plugin forms and actions to prevent unauthorized requests.
🧯 If You Can't Patch
- Remove or disable the More Link Modifier plugin from WordPress
- Implement web application firewall (WAF) rules to block CSRF attempts targeting the plugin
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > Installed Plugins for 'More Link Modifier' version 1.0.3 or earlier.Check Version:
wp plugin list --name=more-link-modifier --field=versionVerify Fix Applied:
Verify the plugin is either updated to version after 1.0.3 or completely removed from the plugins directory.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to WordPress admin-ajax.php or admin-post.php involving more-link-modifier actions
- Multiple failed CSRF validation attempts in WordPress logs
Network Indicators:
- HTTP requests with suspicious referer headers targeting plugin endpoints
- Unexpected JavaScript injection in plugin-related database entries
SIEM Query:
source="wordpress.log" AND ("more-link-modifier" OR "CSRF validation failed")