CVE-2021-30146 Explained : Impact and Mitigation

Seafile 7.0.5 (2019) contains a vulnerability that allows Persistent Cross-Site Scripting (XSS) through the "share of library functionality."

Understanding CVE-2021-30146

This CVE identifies a security flaw in Seafile version 7.0.5 (2019) that can be exploited by attackers to execute persistent XSS attacks.

What is CVE-2021-30146?

The CVE-2021-30146 is a Cross-Site Scripting vulnerability in Seafile 7.0.5 (2019) that permits attackers to inject malicious scripts into web pages viewed by other users.

The Impact of CVE-2021-30146

If exploited, the CVE-2021-30146 vulnerability can lead to unauthorized access, data theft, and potential compromise of sensitive information stored in Seafile instances.

Technical Details of CVE-2021-30146

The technical details of this CVE include:

Vulnerability Description

Seafile 7.0.5 (2019) is susceptible to Persistent XSS attacks via the "share of library functionality," allowing malicious script injection by threat actors.

Affected Systems and Versions

Seafile version 7.0.5 (2019) is affected by this vulnerability.

Exploitation Mechanism

Attackers can exploit the CVE-2021-30146 by crafting malicious library shares to inject and execute XSS payloads within the Seafile web interface.

Mitigation and Prevention

To mitigate the risks associated with CVE-2021-30146, consider the following steps:

Immediate Steps to Take

Update Seafile to the latest version to address the XSS vulnerability.
Sanitize user inputs to prevent script injection.

Long-Term Security Practices

Implement regular security audits and code reviews to identify and address vulnerabilities.
Educate users on safe online practices and the risks associated with XSS attacks.

Patching and Updates

Stay informed about security patches and updates released by Seafile to protect against known vulnerabilities.