What’s Vulnerable › Vulnerabilities

CVE-2025-54075: mdc vulnerable to XSS in markdown rendering bypassing HTML filter. (N°4)

• Severity: high (CVSS 8.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-07-18 · updated 2026-06-17
• Weakness: CWE-79

Description

MDC is a tool to take regular Markdown and write documents interacting deeply with a Vue component. Prior to version 0.17.2, a remote script-inclusion / stored cross-site scripting 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. Version 0.17.2 contains a fix for the issue.

Affected products

• nuxt-modules mdc: before 0.17.2

References

• https://github.com/nuxt-modules/mdc/commit/3657a5bf2326a73cd3d906f57149146a412b962a
• https://github.com/nuxt-modules/mdc/security/advisories/GHSA-cj6r-rrr9-fg82
• https://github.com/nuxt-modules/mdc/security/advisories/GHSA-cj6r-rrr9-fg82

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