CVE-2025-49955
📋 TL;DR
This vulnerability allows attackers to inject malicious scripts into web pages generated by the WP Smart Flexslider WordPress plugin. When users visit a specially crafted URL, the scripts execute in their browsers, potentially stealing credentials or performing unauthorized actions. All WordPress sites using vulnerable versions of this plugin are affected.
💻 Affected Systems
- WP Smart Flexslider 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, install backdoors, or redirect visitors to malicious sites.
Likely Case
Attackers steal user session cookies, perform actions on behalf of authenticated users, or deface websites.
If Mitigated
With proper input validation and output encoding, malicious scripts would be neutralized before reaching users.
🎯 Exploit Status
Reflected XSS vulnerabilities are commonly exploited and require minimal technical skill.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version after 2.5
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find WP Smart Flexslider. 4. Click 'Update Now' if available. 5. If no update appears, deactivate and delete the plugin, then install the latest version from WordPress repository.
🔧 Temporary Workarounds
Disable vulnerable plugin
allTemporarily deactivate WP Smart Flexslider until patched version is available
wp plugin deactivate wp-smart-flexslider
Implement WAF rules
allAdd web application firewall rules to block XSS payloads targeting this plugin
🧯 If You Can't Patch
- Implement Content Security Policy (CSP) headers to restrict script execution
- Use WordPress security plugins that include XSS protection features
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > Installed Plugins for WP Smart Flexslider versionCheck Version:
wp plugin list --name=wp-smart-flexslider --field=versionVerify Fix Applied:
Verify plugin version is greater than 2.5 in WordPress admin panel📡 Detection & Monitoring
Log Indicators:
- Unusual GET/POST requests containing script tags or JavaScript code to plugin endpoints
- Multiple failed XSS attempts in web server logs
Network Indicators:
- HTTP requests with suspicious parameters containing <script>, javascript:, or encoded payloads
SIEM Query:
source="web_server_logs" AND (uri="*wp-smart-flexslider*" AND (param="*<script>*" OR param="*javascript:*"))