CVE-2024-9926
📋 TL;DR
The Jetpack WordPress plugin contains an authorization vulnerability in a REST endpoint that allows any authenticated user (including low-privilege subscribers) to read arbitrary feedback data submitted through Jetpack Contact Forms. This affects WordPress sites using vulnerable versions of Jetpack. The vulnerability exposes sensitive user-submitted information that should be restricted to administrators.
💻 Affected Systems
- Jetpack WordPress Plugin
📦 What is this software?
Jetpack by Automattic
Jetpack by Automattic
Jetpack by Automattic
Jetpack by Automattic
Jetpack by Automattic
Jetpack by Automattic
Jetpack by Automattic
Jetpack by Automattic
Jetpack by Automattic
Jetpack by Automattic
⚠️ Risk & Real-World Impact
Worst Case
Attackers could exfiltrate all contact form submissions containing sensitive personal information, financial data, or confidential communications, leading to data breaches and regulatory violations.
Likely Case
Authenticated users with subscriber roles access contact form data they shouldn't see, potentially exposing personal information, customer inquiries, or sensitive business communications.
If Mitigated
With proper access controls, only authorized administrators can view contact form submissions, maintaining data confidentiality and privacy.
🎯 Exploit Status
Exploitation requires authenticated access but minimal technical skill. Attackers need valid user credentials (even subscriber level).
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 13.5 and later
Vendor Advisory: https://wpscan.com/vulnerability/669382af-f836-4896-bdcb-5c6a57c99bd9/
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find Jetpack and click 'Update Now'. 4. Verify version is 13.5 or higher.
🔧 Temporary Workarounds
Disable Jetpack Contact Forms
allTemporarily disable Jetpack contact forms to prevent data exposure while planning update
Restrict User Registration
allDisable new user registration to limit potential attackers
🧯 If You Can't Patch
- Implement strict access controls and monitor user activity logs for unauthorized access attempts
- Consider using alternative contact form plugins until Jetpack can be updated
🔍 How to Verify
Check if Vulnerable:
Check Jetpack plugin version in WordPress admin under Plugins → Installed PluginsCheck Version:
wp plugin get jetpack --field=versionVerify Fix Applied:
Confirm Jetpack version is 13.5 or higher in plugin details📡 Detection & Monitoring
Log Indicators:
- Unusual access patterns to /wp-json/jetpack/v4/contact-form endpoints from non-admin users
- Multiple failed authentication attempts followed by successful login and API calls
Network Indicators:
- HTTP GET requests to contact form REST endpoints from unexpected user roles
- Increased traffic to /wp-json/jetpack/v4/contact-form
SIEM Query:
source="wordpress" AND (uri_path="/wp-json/jetpack/v4/contact-form" OR uri_path CONTAINS "jetpack") AND user_role!="administrator"