CVE-2021-40888 : Security Advisory and Response

Projectsend version r1295 is affected by a Cross-Site Scripting (XSS) vulnerability due to insufficient sanitization, allowing low privilege users to execute malicious scripts.

Understanding CVE-2021-40888

Projectsend version r1295 is prone to a Cross-Site Scripting (XSS) vulnerability, enabling attackers to execute malicious scripts.

What is CVE-2021-40888?

Projectsend version r1295 is affected by Cross-Site Scripting (XSS) due to lack of sanitization, allowing low privilege users to run malicious scripts.

The Impact of CVE-2021-40888

The vulnerability in Projectsend version r1295 could be exploited by low privilege users to inject and execute malicious scripts.

Technical Details of CVE-2021-40888

Projectsend version r1295 is vulnerable to a Cross-Site Scripting (XSS) attack due to inadequate sanitization processes.

Vulnerability Description

The issue arises from insufficient sanitization when echoing output data in the returnFilesIds() function.
Attackers could craft scripts that would execute when a low privilege user invokes this function via the process.php file.

Affected Systems and Versions

Product: Projectsend
Version: r1295
Status: Affected

Exploitation Mechanism

Attackers can leverage the lack of sanitization in the returnFilesIds() function to insert and execute malicious scripts by calling the function through the process.php file.

Mitigation and Prevention

Projectsend users should take immediate action and follow long-term security practices to mitigate the CVE-2021-40888 vulnerability.

Immediate Steps to Take

Upgrade to a patched version that addresses the XSS vulnerability.
Avoid executing the returnFilesIds() function with untrusted data.

Long-Term Security Practices

Implement input validation and output encoding to prevent XSS attacks.
Conduct regular security audits and monitoring of applications for vulnerabilities.

Patching and Updates

Apply the necessary patches provided by Projectsend to fix the XSS vulnerability.