CVE-2021-25987 : Vulnerability Insights and Analysis

A Stored XSS vulnerability has been discovered in Hexo versions 0.0.1 to 5.4.0, allowing a local attacker to inject arbitrary code.

Understanding CVE-2021-25987

This CVE details a stored XSS vulnerability affecting Hexo versions 0.0.1 to 5.4.0.

What is CVE-2021-25987?

Hexo versions 0.0.1 to 5.4.0 are vulnerable to stored XSS, enabling a malicious attacker to insert harmful code through post content.

The Impact of CVE-2021-25987

The vulnerability poses a medium severity threat with a CVSS base score of 5.0. It requires user interaction to exploit and can lead to code injection by an unprivileged local attacker.

Technical Details of CVE-2021-25987

This section covers the technical specifics of the CVE.

Vulnerability Description

The stored XSS flaw in Hexo versions 0.0.1 to 5.4.0 arises due to inadequate sanitization of malicious JavaScript within post content, enabling code injection.

Affected Systems and Versions

Hexo versions 0.0.1 to 5.4.0 are confirmed to be impacted by this vulnerability.

Exploitation Mechanism

A local unprivileged attacker can exploit this vulnerability by injecting arbitrary code into the web page during generation.

Mitigation and Prevention

Protecting your systems from CVE-2021-25987 requires immediate action and long-term security measures.

Immediate Steps to Take

Update Hexo to a patched version beyond 5.4.0, sanitize post content thoroughly, and monitor for any suspicious activities.

Long-Term Security Practices

Regularly update software, educate users on secure coding practices, and conduct security audits to prevent similar vulnerabilities.

Patching and Updates

Refer to the official Hexo repository for the latest patches and ensure timely application to secure your system.