CVE-2021-41917 : Vulnerability Insights and Analysis

webTareas version 2.4 and earlier is vulnerable to Stored Cross-Site Scripting, allowing authenticated users to store arbitrary web scripts or HTML. The affected endpoint is /clients/editclient.php, enabling attacks on platform users.

Understanding CVE-2021-41917

This CVE implicates webTareas version 2.4 and below, exposing a security flaw that permits the storage of malicious scripts or HTML by authenticated users.

What is CVE-2021-41917?

webTareas version 2.4 and preceding versions are susceptible to a Stored Cross-Site Scripting vulnerability that can be exploited by authenticated users to insert harmful web scripts or HTML.

The Impact of CVE-2021-41917

If exploited, this vulnerability allows attackers to execute Stored Cross-Site Scripting attacks, posing severe threats to platform users and administrators.

Technical Details of CVE-2021-41917

This section provides in-depth technical information about the vulnerability.

Vulnerability Description

The flaw in webTareas version 2.4 and earlier arises from inadequate sanitization of user-supplied data, enabling authenticated users to store malicious web scripts or HTML.

Affected Systems and Versions

Product: webTareas
Vendor: N/A
Versions: 2.4 and earlier

Exploitation Mechanism

The vulnerability can be exploited through the /clients/editclient.php endpoint using the HTTP POST cn parameter.

Mitigation and Prevention

Protective measures and actions to mitigate the CVE-2021-41917 vulnerability.

Immediate Steps to Take

Update webTareas to the latest version.
Implement input validation to prevent the insertion of malicious scripts.
Monitor and sanitize user-supplied data.

Long-Term Security Practices

Conduct regular security audits and code reviews.
Provide security awareness training for users to recognize phishing attempts.

Patching and Updates

Stay informed about security updates and apply patches promptly to address known vulnerabilities.