CVE-2021-43810 : What You Need to Know

Admidio is a free open-source user management system for websites, prone to a Cross-Site Scripting (XSS) vulnerability before version 4.0.12.

Understanding CVE-2021-43810

Admidio experienced a security issue due to improper validation in redirect.php, enabling malicious script execution.

What is CVE-2021-43810?

The vulnerability arises from unvalidated user input, permitting an attacker to inject and execute harmful scripts, potentially compromising user data.

The Impact of CVE-2021-43810

The vulnerability holds a CVSS base score of 8.8, indicating a high severity threat with critical impacts on confidentiality, integrity, and availability.

Technical Details of CVE-2021-43810

Admidio's XSS vulnerability requires understanding its description, affected systems, and exploitation mechanism.

Vulnerability Description

The flaw allows for the execution of arbitrary scripts, leading to potential data breaches or site defacement.

Affected Systems and Versions

Product: Admidio
Vendor: Admidio
Versions Affected: < 4.0.12

Exploitation Mechanism

The vulnerability is exploited by injecting malicious scripts via the url parameter in redirect.php, taking advantage of the lack of proper input validation.

Mitigation and Prevention

To safeguard systems from CVE-2021-43810, immediate actions and long-term security measures are crucial.

Immediate Steps to Take

Upgrade Admidio to version 4.0.12 to patch the vulnerability.
Monitor and restrict user input to mitigate potential XSS attacks.

Long-Term Security Practices

Implement input validation and sanitization mechanisms in web applications.
Educate developers on secure coding practices to prevent similar vulnerabilities.

Patching and Updates

Regularly apply security patches and updates to address known vulnerabilities and enhance system security.