CVE-2025-27309
📋 TL;DR
This stored cross-site scripting (XSS) vulnerability in the Flickr Slideshow Wrapper WordPress plugin allows attackers to inject malicious scripts into web pages. When users view pages containing the malicious content, the scripts execute in their browsers, potentially stealing credentials or performing unauthorized actions. All WordPress sites using affected versions of this plugin are vulnerable.
💻 Affected Systems
- WordPress Flickr Slideshow Wrapper 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, deface websites, install backdoors, or redirect visitors to malicious sites.
Likely Case
Attackers inject malicious JavaScript to steal user session cookies, perform actions as authenticated users, or redirect users to phishing pages.
If Mitigated
With proper input validation and output encoding, malicious scripts would be neutralized before reaching users' browsers.
🎯 Exploit Status
XSS vulnerabilities are commonly exploited, though specific exploit details for this CVE aren't publicly documented.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 5.4.7 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find 'Flickr Slideshow Wrapper'. 4. Click 'Update Now' if update available. 5. Alternatively, download latest version from WordPress repository and replace plugin files.
🔧 Temporary Workarounds
Disable Plugin
allTemporarily deactivate the vulnerable plugin until patched.
wp plugin deactivate flickr-slideshow-wrapper
Content Security Policy
allImplement CSP headers to restrict script execution sources.
Add to .htaccess: Header set Content-Security-Policy "script-src 'self'"
Add to nginx config: add_header Content-Security-Policy "script-src 'self'";
🧯 If You Can't Patch
- Remove plugin entirely and use alternative slideshow solutions
- Implement web application firewall rules to block XSS payloads
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin > Plugins > Installed Plugins for Flickr Slideshow Wrapper version 5.4.6 or earlier.Check Version:
wp plugin get flickr-slideshow-wrapper --field=versionVerify Fix Applied:
Verify plugin version is 5.4.7 or later in WordPress admin panel.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to plugin endpoints
- Suspicious JavaScript in form submissions
- Multiple failed XSS attempts in web server logs
Network Indicators:
- Malicious script tags in HTTP requests
- Suspicious characters like <script> in URL parameters
SIEM Query:
source="*access.log*" AND "flickr-slideshow-wrapper" AND ("<script" OR "javascript:" OR "onerror=" OR "onload=")