CVE-2025-27305
📋 TL;DR
This stored cross-site scripting (XSS) vulnerability in the WordPress Table of Contents Block plugin allows attackers to inject malicious scripts into web pages that persist across user sessions. When users view pages containing the malicious content, their browsers execute the attacker's code, potentially compromising their accounts or sessions. All WordPress sites using vulnerable versions of this plugin are affected.
💻 Affected Systems
- WordPress Table of Contents Block 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 websites, deface content, or redirect users to malicious sites, potentially leading to complete site compromise and data theft.
Likely Case
Attackers inject malicious JavaScript to steal user session cookies, perform actions on behalf of authenticated users, or display phishing content to visitors.
If Mitigated
With proper input validation and output encoding, malicious scripts would be neutralized before reaching users, preventing execution while maintaining plugin functionality.
🎯 Exploit Status
Exploitation requires contributor-level access or higher to inject malicious content; stored XSS payloads persist until removed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.0.3 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find 'Table of Contents Block' and click 'Update Now'. 4. Verify plugin version is 1.0.3 or higher.
🔧 Temporary Workarounds
Disable plugin
allTemporarily disable the vulnerable plugin until patched
wp plugin deactivate table-of-contents-block
Restrict user roles
allLimit content editing to trusted administrators only
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to block XSS payloads
- Enable Content Security Policy (CSP) headers to restrict script execution
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin → Plugins → Installed Plugins for Table of Contents Block version; if version is 1.0.2 or lower, you are vulnerable.Check Version:
wp plugin get table-of-contents-block --field=versionVerify Fix Applied:
After updating, verify plugin version shows 1.0.3 or higher in WordPress admin panel.📡 Detection & Monitoring
Log Indicators:
- Unusual content edits containing script tags, onerror attributes, or javascript: URIs in post/page content
Network Indicators:
- Unexpected outbound connections from user browsers after visiting specific pages
SIEM Query:
source="wordpress" AND ("table-of-contents" OR "toc-block") AND ("script" OR "onerror" OR "javascript:")