CVE-2025-31821
📋 TL;DR
This vulnerability allows attackers to redirect users from legitimate WordPress sites to malicious websites through the Integration of Zoho CRM and Contact Form 7 plugin. It enables phishing attacks by exploiting improper URL validation. WordPress sites using vulnerable versions of this plugin are affected.
💻 Affected Systems
- Integration of Zoho CRM and Contact Form 7 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
Users are redirected to convincing phishing sites that steal credentials, payment information, or install malware, leading to account compromise and data breaches.
Likely Case
Attackers create convincing phishing campaigns using legitimate site URLs, tricking users into entering sensitive information on fake login pages.
If Mitigated
With proper URL validation and user awareness training, impact is limited to failed redirect attempts that may be detected by security tools.
🎯 Exploit Status
Open redirect vulnerabilities are commonly exploited in phishing campaigns and require minimal technical skill to weaponize.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.0.7 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find 'Integration of Zoho CRM and Contact Form 7'. 4. Click 'Update Now' if available. 5. If no update appears, download version 1.0.7+ from WordPress repository and manually update.
🔧 Temporary Workarounds
Disable vulnerable plugin
allTemporarily disable the Integration of Zoho CRM and Contact Form 7 plugin until patched
wp plugin deactivate integration-of-zoho-crm-and-contact-form-7
Implement WAF rules
linuxAdd web application firewall rules to block open redirect attempts
# Example ModSecurity rule: SecRule ARGS "@rx ^https?://(?!trusted\.com)" "id:1001,phase:2,deny,msg:'Open redirect attempt'"
🧯 If You Can't Patch
- Implement strict Content Security Policy (CSP) headers to restrict redirect destinations
- Monitor web server logs for suspicious redirect patterns and implement alerting
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel → Plugins → Installed Plugins for 'Integration of Zoho CRM and Contact Form 7' version 1.0.6 or earlierCheck Version:
wp plugin get integration-of-zoho-crm-and-contact-form-7 --field=versionVerify Fix Applied:
Verify plugin version is 1.0.7 or later in WordPress admin, and test form submissions with malicious redirect parameters📡 Detection & Monitoring
Log Indicators:
- HTTP 302 redirects to external domains from form submissions
- URL parameters containing 'redirect', 'return', or 'url' with external domains
Network Indicators:
- Unexpected redirects from form submission endpoints to unfamiliar domains
- Increased traffic to known phishing domains from your site
SIEM Query:
source="web_server" action="redirect" destination_domain NOT IN (allowed_domains)