CVE-2021-46251 Explained : Impact and Mitigation
Learn about CVE-2021-46251, a reflected cross-site scripting (XSS) flaw in ScratchOAuth2 allowing attackers to execute malicious scripts via crafted POST requests. Find mitigation steps here.
A reflected cross-site scripting (XSS) vulnerability in ScratchOAuth2 allows for the execution of arbitrary web scripts or HTML via a crafted POST request.
Understanding CVE-2021-46251
What is CVE-2021-46251?
A reflected cross-site scripting (XSS) vulnerability in ScratchOAuth2 before commit 1603f04e44ef67dde6ccffe866d2dca16defb293 permits attackers to run malicious web scripts or HTML through a manipulated POST request.
The Impact of CVE-2021-46251
The vulnerability has a CVSSv3.1 base score of 6.1, with a MEDIUM severity rating. It requires user interaction but does not impact confidentiality, integrity, or availability.
Technical Details of CVE-2021-46251
Vulnerability Description
The XSS flaw in ScratchOAuth2 pre-commit 1603f04e44ef67dde6ccffe866d2dca16defb293 enables the injection of arbitrary web scripts or HTML utilizing a tailored POST request.
Affected Systems and Versions
- Affected: ScratchOAuth2
- Versions: All versions before commit 1603f04e44ef67dde6ccffe866d2dca16defb293
Exploitation Mechanism
- Attack Complexity: LOW
- Attack Vector: NETWORK
- Privileges Required: NONE
- User Interaction: REQUIRED
Mitigation and Prevention
Immediate Steps to Take
- Update ScratchOAuth2 to the latest version post commit 1603f04e44ef67dde6ccffe866d2dca16defb293
- Validate and sanitize user inputs to prevent XSS attacks
Long-Term Security Practices
- Conduct regular security assessments and code reviews for vulnerabilities
- Implement security headers like Content Security Policy (CSP)
Patching and Updates
It is crucial to apply patches promptly and keep software components up to date.