CVE-2025-26746
📋 TL;DR
This vulnerability allows attackers to inject malicious scripts into web pages through the Advanced Custom Fields: Link Picker Field WordPress plugin. When exploited, it enables reflected cross-site scripting (XSS) attacks that can steal user sessions, redirect users, or deface websites. WordPress sites using vulnerable versions of this plugin are affected.
💻 Affected Systems
- Advanced Custom Fields: Link Picker Field 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, install backdoors, or pivot to attack other systems.
Likely Case
Attackers steal user session cookies, redirect users to malicious sites, or perform actions on behalf of authenticated users.
If Mitigated
With proper input validation and output encoding, the attack would fail to execute malicious scripts.
🎯 Exploit Status
Reflected XSS vulnerabilities are commonly exploited and require minimal technical skill.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.2.9 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find 'Advanced Custom Fields: Link Picker Field'. 4. Click 'Update Now' if available, or download version 1.2.9+ from WordPress repository. 5. Replace plugin files with patched version.
🔧 Temporary Workarounds
Disable vulnerable plugin
allTemporarily deactivate the plugin until patched version is available
Implement WAF rules
allAdd web application firewall rules to block XSS payloads targeting the vulnerable endpoint
🧯 If You Can't Patch
- Implement Content Security Policy (CSP) headers to restrict script execution
- Use input validation and output encoding in custom code that interacts with the plugin
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > Advanced Custom Fields: Link Picker Field version numberCheck Version:
wp plugin list --name='Advanced Custom Fields: Link Picker Field' --field=versionVerify Fix Applied:
Verify plugin version is 1.2.9 or higher in WordPress admin panel📡 Detection & Monitoring
Log Indicators:
- Unusual GET/POST requests containing script tags or JavaScript payloads
- Multiple failed login attempts following suspicious URL parameters
Network Indicators:
- HTTP requests with suspicious parameters containing <script>, javascript:, or encoded payloads
SIEM Query:
source="wordpress.log" AND ("<script" OR "javascript:" OR "%3Cscript" OR "%22onload%22")