CVE-2020-13971 Explained : Impact and Mitigation
Learn about CVE-2020-13971, a vulnerability in Shopware allowing authenticated users to upload SVG images containing JavaScript, leading to Persistent XSS attacks. Find mitigation steps and prevention measures.
In Shopware before 6.2.3, authenticated users can exploit a vulnerability allowing them to upload SVG images containing JavaScript, leading to Persistent XSS.
Understanding CVE-2020-13971
In this CVE, a security issue in Shopware before version 6.2.3 enables authenticated users to perform a specific action that can result in a Persistent XSS attack.
What is CVE-2020-13971?
Shopware versions prior to 6.2.3 allow authenticated users to utilize the Mediabrowser fileupload feature to upload SVG images containing JavaScript. This action can lead to Persistent XSS, where an uploaded image can be accessed without authentication.
The Impact of CVE-2020-13971
The vulnerability permits authenticated users to upload malicious SVG images, potentially leading to Persistent XSS attacks within the Shopware platform.
Technical Details of CVE-2020-13971
This section provides more in-depth technical insights into the CVE.
Vulnerability Description
The vulnerability in Shopware before 6.2.3 allows authenticated users to upload SVG images containing JavaScript, resulting in Persistent XSS.
Affected Systems and Versions
- Product: Not applicable
- Vendor: Not applicable
- Versions affected: Not applicable
Exploitation Mechanism
The exploitation involves using the Mediabrowser fileupload feature in Shopware to upload SVG images containing JavaScript, enabling attackers to execute Persistent XSS attacks.
Mitigation and Prevention
Protecting systems from CVE-2020-13971 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Upgrade Shopware to version 6.2.3 or newer to mitigate the vulnerability.
- Avoid uploading SVG images with embedded JavaScript.
- Regularly monitor and review uploaded images for malicious content.
Long-Term Security Practices
- Conduct regular security training for users to raise awareness of potential risks.
- Implement content security policies to restrict the execution of scripts from unauthorized sources.
Patching and Updates
- Stay informed about security updates and patches released by Shopware.
- Apply patches promptly to ensure the platform's security is up to date.