TI-2025-18659 Aliases CVE-2025-24981 GHSA-j82m-pc2v-2484

Parsed HTML anchor links in Markdown provided to parseMarkdown can result in XSS in @nuxtjs/mdc

HIGH 79CWE-79Published 2025-02-06 · Updated 2025-02-12

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Cross-site scripting
Confidentiality · integrity · availability: High · None · Low
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-79.

Summary

MDC is a tool to take regular Markdown and write documents interacting deeply with a Vue component. In affected versions unsafe parsing logic of the URL from markdown can lead to arbitrary JavaScript code due to a bypass to the existing guards around the `javascript:` protocol scheme in the URL. The parsing logic implement in `props.ts` maintains a deny-list approach to filtering potential malicious payload. It does so by matching protocol schemes like `javascript:` and others. These security guards can be bypassed by an adversarial that provides JavaScript URLs with HTML entities encoded via hex string. Users who consume this library and perform markdown parsing from unvalidated sources could result in rendering vulnerable XSS anchor links. This vulnerability has been addressed in version 0.13.3 and all users are advised to upgrade. There are no known workarounds for this vulnerability.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00684 52nd percentileScored 2026-11-07

Fix Fixed mdc (nuxt-modules): 0.13.3@nuxtjs/mdc (npm): 0.13.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
nuxt-modules	mdc	before 0.13.3	0.13.3	Patch available	CNA
—	@nuxtjs/mdc (npm)	before 0.13.3	0.13.3	Patch available	GHSA-j82m-pc2v-2484

mdc Vendornuxt-modules Affected before 0.13.3 Fixed in 0.13.3 Patch available CNA
@nuxtjs/mdc (npm) Vendor— Affected before 0.13.3 Fixed in 0.13.3 Patch available GHSA-j82m-pc2v-2484

Remediation

Fix · CNA mdc (nuxt-modules) Fixed in 0.13.3
Fix · GHSA-j82m-pc2v-2484 @nuxtjs/mdc (npm) Fixed in 0.13.3 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2025-24981
2026-10-03 Alias added: GHSA-j82m-pc2v-2484

References

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2025-24981

Other 4

TI-2025-33918 mdc vulnerable to XSS in markdown rendering bypassing HTML filter. (N°4) CVSS 3.1HIGH 8.3
TI-2026-44231 Nuxt OG Image has unauthenticated SSRF via `fonts[].path` URL parameter CVSS 4.0MEDIUM 6.9
TI-2026-74652 Cache poisoning in Nuxt OG Image via unsigned image routes CVSS 4.0MEDIUM 6.9
TI-2026-32501 nuxt-og-image SSRF — bypass of GHSA-pqhr-mp3f-hrpp / v6.2.5 fix (IPv6 + redirect) CVSS 3.1LOW 3.7

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences