CVE-2023-2781 – This vulnerability allows unauthenticated attac... (How to Fix)

Q: What is the severity of CVE-2023-2781?

CVE-2023-2781 has a CVSS score of 8.1 (HIGH). This vulnerability allows unauthenticated attackers to bypass authentication in the User Email Verification for WooCommerce WordPress plugin by exploiting weak random token generation. Attackers can impersonate any user, including administrators, and automatically log in as them if the 'Allow Automatic Login After Successful Verification' setting is enabled. All WordPress sites using vulnerable plugin versions are affected.

📋 TL;DR

This vulnerability allows unauthenticated attackers to bypass authentication in the User Email Verification for WooCommerce WordPress plugin by exploiting weak random token generation. Attackers can impersonate any user, including administrators, and automatically log in as them if the 'Allow Automatic Login After Successful Verification' setting is enabled. All WordPress sites using vulnerable plugin versions are affected.

💻 Affected Systems

Products:

User Email Verification for WooCommerce WordPress plugin

Versions: Up to and including 3.5.0

Operating Systems: All

Default Config Vulnerable: ✅ No

Notes: Requires 'Allow Automatic Login After Successful Verification' setting to be enabled for full impact. This setting is disabled by default.

📦 What is this software?

User Email Verification For Woocommerce by Wisetr

View all CVEs affecting User Email Verification For Woocommerce →

⚠️ Risk & Real-World Impact

🔴

Worst Case

Complete site takeover with administrative privileges, allowing data theft, malware installation, and full system compromise.

🟠

Likely Case

Unauthorized access to user accounts, potential privilege escalation to administrator if automatic login is enabled.

🟢

If Mitigated

Limited impact if automatic login is disabled, but still allows unauthorized verification attempts.

🌐 Internet-Facing: HIGH

🏢 Internal Only: MEDIUM

🎯 Exploit Status

Public PoC: ⚠️ Yes

Weaponized: LIKELY

Unauthenticated Exploit: ⚠️ Yes

Complexity: LOW

Exploitation requires minimal technical skill and can be automated.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: 3.5.1

Vendor Advisory: https://plugins.trac.wordpress.org/changeset/2928828/woo-confirmation-email

Restart Required: No

Instructions:

1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find 'User Email Verification for WooCommerce'. 4. Click 'Update Now' if available. 5. Alternatively, download version 3.5.1+ from WordPress repository and manually update.

🔧 Temporary Workarounds

Disable Automatic Login Setting

all

Disable the vulnerable feature that allows automatic login after verification

Temporary Plugin Deactivation

linux

Deactivate the plugin until patched if immediate update isn't possible

wp plugin deactivate woo-confirmation-email

🧯 If You Can't Patch

Disable the 'Allow Automatic Login After Successful Verification' setting in plugin configuration
Implement web application firewall rules to block suspicious verification requests

🔍 How to Verify

Check if Vulnerable:

Check plugin version in WordPress admin under Plugins → Installed Plugins. If version is 3.5.0 or lower, you are vulnerable.

Check Version:

wp plugin get woo-confirmation-email --field=version

Verify Fix Applied:

Verify plugin version is 3.5.1 or higher after update. Test that email verification functionality still works normally.

📡 Detection & Monitoring

Log Indicators:

Multiple failed verification attempts from same IP
Unusual user login patterns after verification requests
Verification requests for administrative accounts

Network Indicators:

HTTP POST requests to /wp-admin/admin-ajax.php with action=xlwuev_resend_verification_email
Unusual spikes in verification-related traffic

SIEM Query:

source="wordpress.log" AND "xlwuev_resend_verification_email" AND status=200

📊 Metadata

CVE ID: CVE-2023-2781

CVSS v3 Score: 8.1 (HIGH)

CVSS Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CWE: CWE-306

Published: June 3, 2023

Last Updated: November 21, 2024

🔗 References

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🔗 Related Vulnerabilities

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