CVE-2024-56510: Marp Core allows XSS by improper neutralization of HTML sanitization

Severity: medium (CVSS 5.3 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: 2024-12-26 · updated 2026-06-17
Weakness: CWE-79

Description

@marp-team/marp-core is the core for Marp, which is the ecosystem to write your presentation with plain Markdown. Marp Core from v3.0.2 to v3.9.0 and v4.0.0, are vulnerable to cross-site scripting (XSS) due to improper neutralization of HTML sanitization. Marp Core v3.9.1 and v4.0.1 have been patched to fix that. If you are unable to update the package immediately, disable all HTML tags by setting html: false option in the Marp class constructor.

Affected products

marp-team marp-core: from 3.0.2, < 3.9.1; from 4.0.0, < 4.0.1

References

https://github.com/marp-team/marp-core/commit/61a1def244d1b6faa8e2c0be97ec0b68cab3ab49
https://github.com/marp-team/marp-core/pull/282
https://github.com/marp-team/marp-core/releases/tag/v3.9.1
https://github.com/marp-team/marp-core/releases/tag/v4.0.1
https://github.com/marp-team/marp-core/security/advisories/GHSA-x52f-h5g4-8qv5

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