CVE-2025-62125
📋 TL;DR
This stored cross-site scripting (XSS) vulnerability in the WordPress Custom Background Changer plugin allows attackers to inject malicious scripts that execute when other users view affected pages. All WordPress sites using vulnerable versions of this plugin are affected, potentially compromising user sessions and site integrity.
💻 Affected Systems
- Custom Background Changer 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, deface websites, redirect users to malicious sites, or install backdoors for persistent access.
Likely Case
Session hijacking, cookie theft, and unauthorized actions performed on behalf of authenticated users.
If Mitigated
Limited to content manipulation within the plugin's scope, with minimal impact if proper input validation and output encoding are implemented.
🎯 Exploit Status
Stored XSS vulnerabilities are commonly exploited. While no public PoC is mentioned, the vulnerability type is well-understood and easily weaponized.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Versions after 3.0
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find 'Custom Background Changer'. 4. If update is available, click 'Update Now'. 5. If no update appears, deactivate and delete the plugin, then install the latest version from WordPress repository.
🔧 Temporary Workarounds
Disable Plugin
allTemporarily deactivate the vulnerable plugin until patched
wp plugin deactivate custom-background-changer
Content Security Policy
allImplement 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
- Restrict plugin access to trusted users only and monitor for suspicious activity
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin > Plugins > Installed Plugins for 'Custom Background Changer' version 3.0 or earlierCheck Version:
wp plugin get custom-background-changer --field=versionVerify Fix Applied:
Confirm plugin version is higher than 3.0 in WordPress admin panel📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to plugin endpoints
- JavaScript payloads in input fields
- Multiple failed authentication attempts following plugin access
Network Indicators:
- Unexpected outbound connections after plugin interaction
- Suspicious script tags in HTTP requests
SIEM Query:
source="wordpress.log" AND "custom-background-changer" AND ("script" OR "javascript" OR "onload" OR "onerror")