CVE-2025-31617
📋 TL;DR
This CSRF vulnerability in the PostmarkApp Email Integrator WordPress plugin allows attackers to trick authenticated administrators into performing unintended actions. Attackers could exploit this to modify plugin settings or potentially chain it with other vulnerabilities. All WordPress sites using PostmarkApp Email Integrator versions up to 2.4 are affected.
💻 Affected Systems
- PostmarkApp Email Integrator 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 chain CSRF with stored XSS to compromise admin sessions, deface websites, or redirect users to malicious sites.
Likely Case
Attackers modify plugin email settings to intercept or redirect emails, potentially exposing sensitive communications.
If Mitigated
With proper CSRF tokens and same-origin policies, exploitation would fail even if users are tricked into clicking malicious links.
🎯 Exploit Status
Exploitation requires social engineering to trick authenticated administrators into clicking malicious links.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.5 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find PostmarkApp Email Integrator. 4. Click 'Update Now' if available. 5. If no update appears, download version 2.5+ from WordPress repository and manually update.
🔧 Temporary Workarounds
Implement CSRF Protection Headers
ApacheAdd Content-Security-Policy headers to restrict form submissions
Add to .htaccess: Header set Content-Security-Policy "form-action 'self'"
Disable Plugin Temporarily
WordPress CLIDeactivate vulnerable plugin until patched
wp plugin deactivate postmarkapp-email-integrator
🧯 If You Can't Patch
- Restrict admin panel access to trusted IP addresses only
- Implement additional authentication factors for admin actions
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin > Plugins > PostmarkApp Email Integrator > Version. If version is 2.4 or lower, you are vulnerable.Check Version:
wp plugin get postmarkapp-email-integrator --field=versionVerify Fix Applied:
After update, verify version shows 2.5 or higher in WordPress plugins list.📡 Detection & Monitoring
Log Indicators:
- Multiple POST requests to /wp-admin/admin.php?page=postmarkapp-email-integrator from unexpected referrers
- Unusual plugin setting changes in WordPress logs
Network Indicators:
- HTTP requests with suspicious referer headers pointing to external domains
- Unexpected POST requests to admin endpoints without CSRF tokens
SIEM Query:
source="wordpress.log" AND ("postmarkapp-email-integrator" OR "admin.php?page=postmarkapp") AND status=200 AND referer NOT CONTAINS "yourdomain.com"