CVE-2021-23899 : Exploit Details and Defense Strategies

OWASP json-sanitizer before version 1.2.2 is vulnerable to emitting closing SCRIPT tags and CDATA section delimiters for crafted input, enabling an attacker to inject malicious HTML or XML code into embedding documents.

Understanding CVE-2021-23899

This CVE impacts OWASP json-sanitizer before version 1.2.2, allowing for HTML or XML injection attacks.

What is CVE-2021-23899?

OWASP json-sanitizer before 1.2.2 may emit closing SCRIPT tags and CDATA section delimiters for crafted input, enabling attackers to inject arbitrary HTML or XML into embedding documents.

The Impact of CVE-2021-23899

The vulnerability in OWASP json-sanitizer can be exploited by attackers to inject malicious HTML or XML code into embedding documents, potentially leading to various security risks.

Technical Details of CVE-2021-23899

OWASP json-sanitizer before 1.2.2 has the following technical aspects:

Vulnerability Description

The vulnerability allows attackers to inject arbitrary HTML or XML code into embedding documents by manipulating crafted input.

Affected Systems and Versions

All versions of OWASP json-sanitizer before 1.2.2 are affected by this vulnerability.

Exploitation Mechanism

Attackers can exploit this vulnerability by leveraging the emitted closing SCRIPT tags and CDATA section delimiters to insert malicious HTML or XML code.

Mitigation and Prevention

To mitigate the risks associated with CVE-2021-23899, take the following steps:

Immediate Steps to Take

Update OWASP json-sanitizer to version 1.2.2 or later to address this vulnerability.

Long-Term Security Practices

Implement input validation and sanitization mechanisms to prevent malicious input from being processed.

Patching and Updates

Regularly update and patch all software components to protect against known vulnerabilities and security issues.