CVE-2020-8280 : What You Need to Know
Learn about CVE-2020-8280 affecting Nextcloud Contacts 3.4.0, allowing malicious users to perform XSS attacks by uploading SVG files as PNG files. Find mitigation steps and prevention measures.
Nextcloud Contacts 3.4.0 allows a malicious user to perform cross-site scripting (XSS) attacks by uploading SVG files as PNG files.
Understanding CVE-2020-8280
A missing file type check in Nextcloud Contacts 3.4.0 enables XSS attacks through file manipulation.
What is CVE-2020-8280?
This CVE describes a vulnerability in Nextcloud Contacts that permits malicious users to execute XSS attacks by uploading SVG files disguised as PNG files.
The Impact of CVE-2020-8280
The vulnerability allows attackers to inject malicious scripts into web pages viewed by other users, potentially leading to data theft or unauthorized actions.
Technical Details of CVE-2020-8280
The technical aspects of the vulnerability in Nextcloud Contacts 3.4.0.
Vulnerability Description
A missing file type check in Nextcloud Contacts 3.4.0 allows malicious users to upload SVG files as PNG files, leading to XSS attacks.
Affected Systems and Versions
- Product: Nextcloud Contacts
- Version: 3.4.0
- Fixed Version: 3.4.1
Exploitation Mechanism
Attackers exploit the vulnerability by uploading SVG files with malicious scripts, which are executed when other users view the files as PNG images.
Mitigation and Prevention
Steps to mitigate and prevent exploitation of CVE-2020-8280.
Immediate Steps to Take
- Update Nextcloud Contacts to version 3.4.1 to patch the vulnerability.
- Avoid opening files from untrusted sources to prevent XSS attacks.
Long-Term Security Practices
- Regularly update software and apply security patches to prevent known vulnerabilities.
- Educate users on safe file handling practices to minimize the risk of XSS attacks.
Patching and Updates
Ensure timely installation of software updates and security patches to protect systems from known vulnerabilities.