CVE-2023-53919
📋 TL;DR
PodcastGenerator 3.2.9 contains a stored cross-site scripting vulnerability in the Freebox content field. Attackers can inject malicious JavaScript that executes when users visit the application's home page, potentially stealing session cookies or performing unauthorized actions. All PodcastGenerator 3.2.9 installations with theme customization enabled are affected.
💻 Affected Systems
- PodcastGenerator
📦 What is this software?
Podcast Generator by Podcastgenerator
⚠️ Risk & Real-World Impact
Worst Case
Attackers steal administrator session cookies, gain full administrative access, deface the website, or deploy malware to visitors.
Likely Case
Session hijacking of logged-in users, credential theft, or defacement of the home page.
If Mitigated
Limited impact if input validation and output encoding are implemented, though stored XSS remains dangerous.
🎯 Exploit Status
Exploit requires admin credentials to access theme_freebox.php. Public exploit code is available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 3.2.10 or later
Vendor Advisory: https://podcastgenerator.net/
Restart Required: No
Instructions:
1. Backup your current installation. 2. Download the latest version from podcastgenerator.net. 3. Replace all files except the 'episodes' and 'images' directories. 4. Verify theme_freebox.php has proper input sanitization.
🔧 Temporary Workarounds
Disable Freebox Content Field
allRemove or disable the Freebox content field in theme customization to prevent injection.
Edit theme_freebox.php and comment out or remove the vulnerable input field.
Implement Input Validation
allAdd server-side validation to sanitize Freebox content input.
Add htmlspecialchars() or similar filtering to the Freebox content processing code in theme_freebox.php.
🧯 If You Can't Patch
- Restrict admin access to trusted IP addresses only.
- Implement a Web Application Firewall (WAF) with XSS protection rules.
🔍 How to Verify
Check if Vulnerable:
Check if PodcastGenerator version is 3.2.9 and review theme_freebox.php for lack of input sanitization.Check Version:
Check the version.txt file in the PodcastGenerator root directory or view the admin dashboard.Verify Fix Applied:
After patching, test by attempting to inject JavaScript into the Freebox content field and verify it doesn't execute.📡 Detection & Monitoring
Log Indicators:
- Unusual admin login attempts
- Modifications to theme_freebox.php or related files
Network Indicators:
- Suspicious JavaScript payloads in HTTP POST requests to theme_freebox.php
SIEM Query:
source="web_logs" AND (uri="/theme_freebox.php" AND method="POST" AND (body CONTAINS "<script>" OR body CONTAINS "javascript:"))