CVE-2020-28470 : What You Need to Know
Learn about CVE-2020-28470, a high severity Cross-site Scripting (XSS) vulnerability in @scullyio/scully before 1.0.9. Find out the impact, affected systems, exploitation mechanism, and mitigation steps.
This CVE involves a Cross-site Scripting (XSS) vulnerability in the package @scullyio/scully before version 1.0.9, impacting the transfer state serialization process.
Understanding CVE-2020-28470
This vulnerability was made public on January 14, 2021, with a high severity base score of 7.3.
What is CVE-2020-28470?
CVE-2020-28470 is a Cross-site Scripting (XSS) vulnerability found in the @scullyio/scully package before version 1.0.9. The issue arises from serializing the transfer state using JSON.stringify() and then embedding it into an HTML page.
The Impact of CVE-2020-28470
The vulnerability has a high severity base score of 7.3, with a medium temporal severity score of 6.6. It can be exploited with proof of concept code maturity, affecting confidentiality, integrity, and availability.
Technical Details of CVE-2020-28470
This section provides more in-depth technical insights into the vulnerability.
Vulnerability Description
The vulnerability allows for Cross-site Scripting (XSS) attacks due to improper serialization of the transfer state, leading to potential script injection in the HTML page.
Affected Systems and Versions
- Package: @scullyio/scully
- Versions Affected: < 1.0.9
- Version Type: Custom
Exploitation Mechanism
The vulnerability can be exploited remotely with a low attack complexity over the network, requiring no privileges. The attacker can inject malicious scripts into the HTML page.
Mitigation and Prevention
To address CVE-2020-28470 and enhance security measures, follow these mitigation strategies:
Immediate Steps to Take
- Upgrade @scullyio/scully to version 1.0.9 or higher to eliminate the vulnerability.
- Avoid serializing sensitive data directly into HTML pages.
Long-Term Security Practices
- Implement input validation and output encoding to prevent XSS attacks.
- Regularly scan and monitor for vulnerabilities in third-party packages.
Patching and Updates
- Stay informed about security updates for @scullyio/scully and promptly apply patches to secure your application.