CVE-2025-48236
📋 TL;DR
This stored cross-site scripting (XSS) vulnerability in bunny.net WordPress plugin allows attackers to inject malicious scripts into web pages that are then executed when other users view those pages. All WordPress sites using bunny.net plugin versions up to 2.3.0 are affected. The vulnerability enables session hijacking, credential theft, and website defacement.
💻 Affected Systems
- bunny.net 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 credentials, take over the WordPress site, install backdoors, and compromise all user data including customer information and payment details.
Likely Case
Attackers inject malicious JavaScript to steal user session cookies, redirect users to phishing sites, or deface the website with malicious content.
If Mitigated
With proper input validation and output encoding, malicious scripts would be neutralized before reaching users, preventing execution.
🎯 Exploit Status
XSS vulnerabilities are commonly exploited and weaponized. The Patchstack advisory provides technical details that could be used to create exploits.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.3.1 or later
Vendor Advisory: https://patchstack.com/database/wordpress/plugin/bunnycdn/vulnerability/wordpress-bunny-net-2-3-0-cross-site-scripting-xss-vulnerability?_s_id=cve
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find bunny.net plugin. 4. Click 'Update Now' if update is available. 5. Alternatively, download latest version from WordPress repository and manually update.
🔧 Temporary Workarounds
Disable bunny.net plugin
allTemporarily disable the vulnerable plugin until patched
wp plugin deactivate bunnycdn
Implement Content Security Policy
allAdd CSP headers to restrict script execution
Add to .htaccess: Header set Content-Security-Policy "default-src 'self'; script-src 'self'"
Add to wp-config.php: header("Content-Security-Policy: default-src 'self'; script-src 'self'");
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to block XSS payloads
- Enable WordPress security plugins with XSS protection features
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin → Plugins → Installed Plugins for bunny.net version. If version is 2.3.0 or earlier, you are vulnerable.Check Version:
wp plugin list --name=bunnycdn --field=versionVerify Fix Applied:
After updating, verify bunny.net plugin version is 2.3.1 or later in WordPress admin panel.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to bunny.net endpoints with script tags
- Multiple failed XSS attempts in web server logs
- Suspicious user agent strings containing script payloads
Network Indicators:
- HTTP requests containing <script> tags to bunny.net endpoints
- Outbound connections to suspicious domains after page loads
SIEM Query:
source="web_server" AND ("<script" OR "javascript:" OR "onload=" OR "onerror=") AND uri="*bunny*"