CVE-2025-30858
📋 TL;DR
This vulnerability allows attackers to inject malicious scripts into Snow Storm WordPress plugin pages, which execute in victims' browsers when they visit specially crafted URLs. It affects all WordPress sites using Snow Storm plugin versions up to 1.4.6.
💻 Affected Systems
- Tribulant Software Snow Storm 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 session cookies, redirect users to malicious sites, or perform actions on behalf of authenticated users if combined with other vulnerabilities.
Likely Case
Attackers craft phishing links that execute scripts to steal session tokens or display fake login forms to capture credentials.
If Mitigated
With proper input validation and output encoding, malicious scripts are neutralized before reaching users' browsers.
🎯 Exploit Status
Reflected XSS typically requires user interaction (clicking malicious link) but is trivial to exploit once crafted.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.4.7 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find Snow Storm plugin. 4. Click 'Update Now' if update available. 5. If no update available, deactivate and delete plugin, then install fresh version from WordPress repository.
🔧 Temporary Workarounds
Disable Snow Storm Plugin
allTemporarily disable the vulnerable plugin until patched version is available.
wp plugin deactivate snow-storm
Web Application Firewall Rule
allAdd WAF rule to block requests containing XSS payloads targeting Snow Storm parameters.
ModSecurity rule: SecRule ARGS "<script" "id:1001,phase:2,deny,status:403,msg:'XSS Attempt'"
Cloudflare WAF: Create rule blocking requests with 'snow-storm' in URL and script patterns
🧯 If You Can't Patch
- Implement Content Security Policy (CSP) headers to restrict script execution sources
- Deploy web application firewall with XSS detection rules
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > Installed Plugins for Snow Storm version. If version is 1.4.6 or earlier, system is vulnerable.Check Version:
wp plugin list --name=snow-storm --field=versionVerify Fix Applied:
After update, verify Snow Storm plugin shows version 1.4.7 or later in WordPress plugins list.📡 Detection & Monitoring
Log Indicators:
- HTTP requests containing 'snow-storm' in URL with script tags or JavaScript in parameters
- Multiple 403 errors from WAF blocking XSS attempts
Network Indicators:
- Unusual outbound connections from WordPress server after XSS payload delivery
- Traffic patterns showing script injection in Snow Storm plugin requests
SIEM Query:
source="web_server_logs" AND (url="*snow-storm*" AND (param="*<script*" OR param="*javascript:*" OR param="*onload=*"))