CVE-2025-24981
CriticalSummary
MDC to narzędzie do przetwarzania Markdown, które w dotkniętych wersjach ma niebezpieczną logikę analizy URL, co może prowadzić do wykonania dowolnego kodu JavaScript. Bypass istniejących zabezpieczeń wokół schematu protokołu `javascript:` umożliwia atakującym wykorzystanie złośliwych łączy XSS.
Risk Assessment
Organizacje korzystające z tej biblioteki i przetwarzające Markdown z niezaufanych źródeł mogą być narażone na ataki XSS, co może prowadzić do kradzieży danych lub przejęcia sesji użytkowników.
Recommendation
Zaleca się aktualizację do wersji 0.13.3, aby usunąć tę podatność. Nie ma znanych obejść dla tej luki bezpieczeństwa.
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Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

