CVE-2020-5223 : Security Advisory and Response
Learn about CVE-2020-5223, a persistent XSS vulnerability in PrivateBin versions 1.2.0 before 1.2.2 and 1.3.0 before 1.3.2. Upgrade to versions 1.2.2 and 1.3.2 to protect against this security issue.
PrivateBin versions 1.2.0 before 1.2.2 and 1.3.0 before 1.3.2 are affected by a persistent XSS vulnerability in the filename of attached files.
Understanding CVE-2020-5223
PrivateBin versions 1.2.0 before 1.2.2 and 1.3.0 before 1.3.2 are susceptible to a persistent XSS attack due to a vulnerability in the handling of attachment file names.
What is CVE-2020-5223?
In PrivateBin versions 1.2.0 before 1.2.2 and 1.3.0 before 1.3.2, a persistent XSS attack is possible. A user-provided attachment file name can inject HTML, leading to a persistent Cross-site scripting (XSS) vulnerability.
The Impact of CVE-2020-5223
- CVSS Base Score: 6.1 (Medium)
- Attack Vector: Local
- Attack Complexity: High
- Privileges Required: High
- Confidentiality Impact: High
- Integrity Impact: Low
- Scope: Changed
- User Interaction: None
- Availability Impact: None
Technical Details of CVE-2020-5223
Vulnerability Description
The vulnerability allows for a persistent XSS attack through user-provided attachment file names in PrivateBin versions 1.2.0 before 1.2.2 and 1.3.0 before 1.3.2.
Affected Systems and Versions
PrivateBin versions 1.2.0 before 1.2.2 and 1.3.0 before 1.3.2.
Exploitation Mechanism
Under certain conditions, a user-provided attachment file name can inject HTML, leading to a persistent XSS vulnerability.
Mitigation and Prevention
Immediate Steps to Take
- Upgrade PrivateBin to versions 1.2.2 and 1.3.2 to mitigate the vulnerability.
- Regularly monitor for security advisories and updates from PrivateBin.
Long-Term Security Practices
- Implement input validation mechanisms to prevent XSS attacks.
- Educate users on safe attachment file naming practices.
Patching and Updates
- Apply patches and updates provided by PrivateBin promptly to address security vulnerabilities.