CVE-2023-29426
📋 TL;DR
This Cross-Site Request Forgery (CSRF) vulnerability in the WordPress Spreadshop plugin allows attackers to trick authenticated administrators into performing unintended actions. Attackers can create malicious web pages that, when visited by logged-in administrators, can modify plugin settings or perform other administrative actions without consent. This affects all WordPress sites using Spreadshop plugin version 1.6.5 or earlier.
💻 Affected Systems
- WordPress Spreadshop Plugin by Robert Schulz (sprd.Net AG)
📦 What is this software?
Spreadshop by Spreadshop
⚠️ Risk & Real-World Impact
Worst Case
Attackers could completely compromise the WordPress site by changing administrator credentials, installing backdoors, or modifying critical site settings through forged administrative requests.
Likely Case
Attackers modify plugin settings to redirect users, inject malicious content, or change shop configurations to benefit the attacker financially.
If Mitigated
With proper CSRF protections and user awareness, the risk is limited to users who click malicious links while authenticated as administrators.
🎯 Exploit Status
CSRF attacks are well-understood and easy to implement. Exploitation requires the victim to be logged in as an administrator and visit a malicious page.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.6.6 or later
Vendor Advisory: https://patchstack.com/database/vulnerability/spreadshop/wordpress-spreadshop-plugin-plugin-1-6-5-cross-site-request-forgery-csrf-vulnerability
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find Spreadshop plugin. 4. Click 'Update Now' if available. 5. Alternatively, download latest version from WordPress repository and manually update.
🔧 Temporary Workarounds
Implement CSRF Protection
allAdd CSRF tokens to all administrative forms in the plugin
Requires custom PHP development to add nonce verification to plugin forms
Disable Plugin
linuxTemporarily disable the Spreadshop plugin until patched
wp plugin deactivate spreadshop
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to detect and block CSRF attempts
- Educate administrators about CSRF risks and safe browsing practices
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > Spreadshop version. If version is 1.6.5 or earlier, you are vulnerable.Check Version:
wp plugin get spreadshop --field=versionVerify Fix Applied:
After updating, verify version shows 1.6.6 or later in WordPress admin plugins page.📡 Detection & Monitoring
Log Indicators:
- Multiple POST requests to spreadshop admin endpoints without referrer headers
- Unusual plugin setting changes in WordPress logs
Network Indicators:
- HTTP requests to spreadshop admin endpoints originating from external domains
SIEM Query:
source="wordpress.log" AND "spreadshop" AND ("POST" OR "admin-ajax.php") AND NOT referer="*your-domain*"🔗 References
- https://patchstack.com/database/vulnerability/spreadshop/wordpress-spreadshop-plugin-plugin-1-6-5-cross-site-request-forgery-csrf-vulnerability?_s_id=cve
- https://patchstack.com/database/vulnerability/spreadshop/wordpress-spreadshop-plugin-plugin-1-6-5-cross-site-request-forgery-csrf-vulnerability?_s_id=cve
