CVE-2025-47677
📋 TL;DR
This stored cross-site scripting (XSS) vulnerability in the GT3 Photo Gallery WordPress plugin allows attackers to inject malicious scripts into web pages that are then executed when other users view those pages. The vulnerability affects all WordPress sites using the GT3 Photo Gallery plugin versions up to 2.7.7.25. Attackers can steal session cookies, redirect users to malicious sites, or perform actions on behalf of authenticated users.
💻 Affected Systems
- Photo Gallery - GT3 Image Gallery & Gutenberg Block Gallery 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, deface websites, or redirect visitors to malicious sites that distribute malware.
Likely Case
Attackers inject malicious JavaScript to steal user session cookies, potentially compromising user accounts and performing unauthorized actions within the WordPress dashboard.
If Mitigated
With proper input validation and output encoding, malicious scripts would be neutralized before being stored or displayed to users.
🎯 Exploit Status
Stored XSS vulnerabilities typically require some level of user interaction or content submission capability, but once exploited, the payload persists and affects all subsequent visitors.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.7.7.26 or later
Restart Required: No
Instructions:
1. Log into WordPress admin dashboard. 2. Navigate to Plugins → Installed Plugins. 3. Find 'Photo Gallery - GT3 Image Gallery & Gutenberg Block Gallery'. 4. Click 'Update Now' if update is available. 5. Alternatively, download version 2.7.7.26+ from WordPress repository and manually update.
🔧 Temporary Workarounds
Disable vulnerable plugin
allTemporarily disable the GT3 Photo Gallery plugin until patched
wp plugin deactivate gt3-photo-video-gallery
Implement Content Security Policy
allAdd CSP headers to restrict script execution sources
Add to .htaccess: Header set Content-Security-Policy "default-src 'self'; script-src 'self'"
Add to nginx config: add_header Content-Security-Policy "default-src 'self'; script-src 'self'";
🧯 If You Can't Patch
- Remove the GT3 Photo Gallery plugin entirely and use alternative gallery solutions
- Implement web application firewall (WAF) rules to block XSS payload patterns
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin dashboard → Plugins → Installed Plugins for GT3 Photo Gallery version. If version is 2.7.7.25 or lower, you are vulnerable.Check Version:
wp plugin get gt3-photo-video-gallery --field=versionVerify Fix Applied:
After updating, verify plugin version shows 2.7.7.26 or higher in WordPress plugins list.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to gallery-related endpoints with script tags or JavaScript payloads
- Multiple failed XSS attempts in web server logs
Network Indicators:
- HTTP requests containing <script> tags or JavaScript code in gallery-related parameters
- Unexpected outbound connections from user browsers after visiting gallery pages
SIEM Query:
source="web_server_logs" AND (uri_path="*gallery*" OR uri_path="*gt3*") AND (http_method="POST" OR http_method="PUT") AND (message="*<script>*" OR message="*javascript:*" OR message="*onload=*" OR message="*onerror=*")