CVE-2025-26939
📋 TL;DR
This stored cross-site scripting (XSS) vulnerability in the Counters Block WordPress plugin allows attackers to inject malicious scripts into web pages. When users view pages containing the compromised counters, their browsers execute the attacker's code. All WordPress sites using vulnerable versions of this plugin are affected.
💻 Affected Systems
- Counters Block 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, redirect visitors to malicious sites, or deploy malware to site visitors' browsers.
Likely Case
Attackers inject malicious JavaScript to steal user session cookies, perform actions as authenticated users, or deface website content.
If Mitigated
With proper input validation and output encoding, malicious scripts would be neutralized before reaching users' browsers.
🎯 Exploit Status
Exploitation requires contributor-level access or higher to inject malicious scripts into posts/pages using the Counters Block.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.1.3 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find 'Counters Block' and click 'Update Now'. 4. Verify plugin version is 1.1.3 or higher.
🔧 Temporary Workarounds
Disable Counters Block Plugin
allTemporarily deactivate the vulnerable plugin until patched
wp plugin deactivate counters-block
Restrict User Roles
allLimit who can create/edit posts with Counters Block to trusted administrators only
🧯 If You Can't Patch
- Implement a web application firewall (WAF) with XSS protection rules
- Enable Content Security Policy (CSP) headers to restrict script execution
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin → Plugins → Installed Plugins for Counters Block version 1.1.2 or earlierCheck Version:
wp plugin get counters-block --field=versionVerify Fix Applied:
Verify Counters Block plugin version is 1.1.3 or higher in WordPress admin📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to wp-admin/admin-ajax.php with counter-related parameters
- JavaScript payloads in post/page content
Network Indicators:
- Suspicious script tags in HTTP responses containing counter data
- Unexpected external resource loads from counter elements
SIEM Query:
source="wordpress.log" AND ("counters-block" OR "counter_" OR "wp_counters") AND ("script" OR "javascript" OR "onclick" OR "onload")