CVE-2019-11556 Explained : Impact and Mitigation

Pagure before version 5.6 is vulnerable to XSS attacks through the templates/blame.html blame view.

Understanding CVE-2019-11556

This CVE involves a cross-site scripting (XSS) vulnerability in Pagure versions prior to 5.6, specifically through the templates/blame.html blame view.

What is CVE-2019-11556?

CVE-2019-11556 is a security vulnerability that allows attackers to execute malicious scripts in a victim's browser when they access a vulnerable Pagure instance.

The Impact of CVE-2019-11556

This vulnerability can be exploited by attackers to perform various malicious actions, such as stealing sensitive information, session hijacking, defacing websites, and spreading malware.

Technical Details of CVE-2019-11556

Pagure before version 5.6 is susceptible to a cross-site scripting (XSS) vulnerability that can be exploited through the templates/blame.html blame view.

Vulnerability Description

The XSS vulnerability in Pagure allows attackers to inject and execute malicious scripts in the context of an authenticated user's session.

Affected Systems and Versions

Product: Pagure
Vendor: N/A
Versions Affected: Prior to 5.6

Exploitation Mechanism

Attackers can exploit this vulnerability by injecting malicious scripts into the blame view of the templates/blame.html file in Pagure instances prior to version 5.6.

Mitigation and Prevention

To mitigate the risks associated with CVE-2019-11556, users and administrators should take immediate steps and adopt long-term security practices.

Immediate Steps to Take

Upgrade Pagure to version 5.6 or later to eliminate the XSS vulnerability.
Regularly monitor and audit Pagure instances for any unauthorized activities.
Educate users about the risks of XSS attacks and encourage safe browsing habits.

Long-Term Security Practices

Implement input validation and output encoding to prevent XSS attacks in web applications.
Stay informed about security updates and patches released by Pagure to address vulnerabilities.

Patching and Updates

Apply security patches and updates provided by Pagure promptly to ensure the protection of your systems and data.