CVE-2021-41844 – CVE-2021-41844 is a critical vulnerability in C... (How to Fix)

Q: What is the severity of CVE-2021-41844?

CVE-2021-41844 has a CVSS score of 9.8 (CRITICAL). CVE-2021-41844 is a critical vulnerability in Crocoblock JetEngine WordPress plugin where improper input validation allows attackers to inject malicious data through forms. This affects all WordPress sites using vulnerable versions of JetEngine. Attackers can exploit this to execute arbitrary code or compromise the website.

📋 TL;DR

CVE-2021-41844 is a critical vulnerability in Crocoblock JetEngine WordPress plugin where improper input validation allows attackers to inject malicious data through forms. This affects all WordPress sites using vulnerable versions of JetEngine. Attackers can exploit this to execute arbitrary code or compromise the website.

💻 Affected Systems

Products:

Crocoblock JetEngine WordPress Plugin

Versions: All versions before 2.9.1

Operating Systems: Any OS running WordPress

Default Config Vulnerable: ⚠️ Yes

Notes: Affects all WordPress installations with JetEngine plugin enabled, regardless of theme or other plugins.

📦 What is this software?

Jetengine by Crocoblock

View all CVEs affecting Jetengine →

⚠️ Risk & Real-World Impact

🔴

Worst Case

Remote code execution leading to complete system compromise, data theft, and website defacement.

🟠

Likely Case

Cross-site scripting (XSS) attacks, form data manipulation, and potential privilege escalation.

🟢

If Mitigated

Limited impact with proper input validation and output encoding in place.

🌐 Internet-Facing: HIGH - WordPress plugins are typically internet-facing and accessible to attackers.

🏢 Internal Only: MEDIUM - Internal WordPress installations could still be targeted through phishing or compromised accounts.

🎯 Exploit Status

Public PoC: ⚠️ Yes

Weaponized: LIKELY

Unauthenticated Exploit: ⚠️ Yes

Complexity: LOW

Form-based vulnerabilities are commonly exploited through automated tools and require minimal technical skill.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: 2.9.1

Vendor Advisory: https://crocoblock.com/changelog/?plugin=jet-engine

Restart Required: No

Instructions:

1. Log into WordPress admin panel. 2. Go to Plugins → Installed Plugins. 3. Find JetEngine and click 'Update Now'. 4. Verify version shows 2.9.1 or higher.

🔧 Temporary Workarounds

Disable JetEngine Plugin

all

Temporarily disable the vulnerable plugin until patching is possible.

wp plugin deactivate jet-engine

Web Application Firewall Rules

all

Implement WAF rules to block suspicious form submissions.

🧯 If You Can't Patch

Implement strict input validation for all form fields
Enable WordPress security plugins with form protection features

🔍 How to Verify

Check if Vulnerable:

Check WordPress admin → Plugins → JetEngine version number.

Check Version:

wp plugin get jet-engine --field=version

Verify Fix Applied:

Confirm JetEngine version is 2.9.1 or higher in WordPress admin.

📡 Detection & Monitoring

Log Indicators:

Unusual POST requests to JetEngine form endpoints
Suspicious payloads in form submissions

Network Indicators:

HTTP requests with encoded payloads to /wp-content/plugins/jet-engine/

SIEM Query:

source="wordpress.log" AND "jet-engine" AND ("POST" OR "malicious" OR "script")

📊 Metadata

CVE ID: CVE-2021-41844

CVSS v3 Score: 9.8 (CRITICAL)

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

CWE: CWE-20

Published: December 15, 2021

Last Updated: November 21, 2024

🔗 References

https://crocoblock.com/changelog/?plugin=jet-engine Release Notes,Vendor Advisory
https://crocoblock.com/changelog/?plugin=jet-engine Release Notes,Vendor Advisory

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🔗 Related Vulnerabilities

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