CVE-2021-40886 Explained : Impact and Mitigation

Projectsend version r1295 is affected by a directory traversal vulnerability allowing a user with the Uploader role to bypass fileName sanitization.

Understanding CVE-2021-40886

Projectsend version r1295 directory traversal vulnerability details.

What is CVE-2021-40886?

This CVE refers to a directory traversal vulnerability in Projectsend version r1295. Exploiting this vulnerability allows a user with the Uploader role to manipulate the chunks parameter, bypassing fileName sanitization.

The Impact of CVE-2021-40886

The vulnerability can be exploited by malicious users to access sensitive files and directories on the server, leading to potential data breaches or unauthorized data manipulation.

Technical Details of CVE-2021-40886

Technical specifics of the directory traversal vulnerability in Projectsend version r1295.

Vulnerability Description

Affected Version: Projectsend version r1295
Vulnerability Type: Directory Traversal
User Role: Uploader
Exploitation: Manipulating the 'chunks' parameter

Affected Systems and Versions

Product: Projectsend
Version: r1295

Exploitation Mechanism

User with Uploader role adds value '2' to the 'chunks' parameter
Bypassing 'fileName' sanitization

Mitigation and Prevention

Steps to mitigate the CVE-2021-40886 vulnerability.

Immediate Steps to Take

Upgrade Projectsend to a patched version
Limit access permissions for Uploader role
Regularly monitor and review file upload activities

Long-Term Security Practices

Conduct regular security audits and penetration testing
Educate users on secure uploading practices
Implement file upload restrictions and validations

Patching and Updates

Projectsend developers should release a patched version addressing the directory traversal issue
Regularly update and patch Projectsend to prevent security vulnerabilities