CVE-2023-23640
📋 TL;DR
This CVE describes a Missing Authorization vulnerability in the MainWP UpdraftPlus Extension for WordPress. It allows users with Subscriber-level permissions to arbitrarily activate plugins, potentially enabling privilege escalation or malicious plugin execution. This affects WordPress sites using the MainWP UpdraftPlus Extension plugin.
💻 Affected Systems
- MainWP UpdraftPlus Extension for WordPress
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
An attacker with subscriber access could activate malicious plugins leading to complete site compromise, data theft, or ransomware deployment.
Likely Case
Privilege escalation allowing subscribers to gain administrative capabilities, potentially leading to unauthorized configuration changes or data access.
If Mitigated
Limited impact if proper role-based access controls and plugin vetting are implemented, with attackers only able to activate already-installed plugins.
🎯 Exploit Status
Exploitation requires subscriber-level credentials. Public proof-of-concept demonstrates the vulnerability.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 4.0.7 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find MainWP UpdraftPlus Extension. 4. Update to version 4.0.7 or later. 5. Verify update completed successfully.
🔧 Temporary Workarounds
Temporary Plugin Deactivation
allDisable the vulnerable plugin until patching is possible
wp plugin deactivate mainwp-updraftplus-extension
Role Restriction
allTemporarily restrict Subscriber role permissions or remove unnecessary subscriber accounts
🧯 If You Can't Patch
- Remove or disable the MainWP UpdraftPlus Extension plugin entirely
- Implement strict access controls and monitor for unauthorized plugin activation attempts
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > Installed Plugins for MainWP UpdraftPlus Extension version 4.0.6 or earlierCheck Version:
wp plugin get mainwp-updraftplus-extension --field=versionVerify Fix Applied:
Confirm plugin version is 4.0.7 or later in WordPress admin panel📡 Detection & Monitoring
Log Indicators:
- Unexpected plugin activation events by non-admin users
- Subscriber accounts performing administrative actions
Network Indicators:
- Unusual plugin-related API calls from non-admin accounts
SIEM Query:
source="wordpress" AND (event="plugin_activated" OR event="plugin_updated") AND user_role="subscriber"🔗 References
- https://patchstack.com/database/vulnerability/mainwp-updraftplus-extension/wordpress-mainwp-updraftplus-extension-plugin-4-0-6-subscriber-arbitrary-plugin-activation-vulnerability?_s_id=cve
- https://patchstack.com/database/vulnerability/mainwp-updraftplus-extension/wordpress-mainwp-updraftplus-extension-plugin-4-0-6-subscriber-arbitrary-plugin-activation-vulnerability?_s_id=cve
