{"id":"GHSA-x52f-h5g4-8qv5","summary":"Marp Core allows XSS by improper neutralization of HTML sanitization","details":"Marp Core ([`@marp-team/marp-core`](https://www.npmjs.com/package/@marp-team/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.\n\n### Impact\n\nMarp Core includes an HTML sanitizer with allowlist support. In the affected versions, the built-in allowlist is enabled by default. When the allowlist is active, if insufficient HTML comments are included, the sanitizer may fail to properly sanitize HTML content and lead cross-site scripting (XSS).\n\n### Patches\n\nMarp Core [v3.9.1](https://github.com/marp-team/marp-core/releases/tag/v3.9.1) and [v4.0.1](https://github.com/marp-team/marp-core/releases/tag/v4.0.1) have been patched to fix that.\n\n### Workarounds\n\nIf you are unable to update the package immediately, disable all HTML tags by setting `html: false` option in the `Marp` class constructor.\n\n```javascript\nconst marp = new Marp({ html: false })\n```\n\n### References\n\n- [CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')](https://cwe.mitre.org/data/definitions/79.html)\n- https://github.com/marp-team/marp-core/pull/282\n- https://github.com/marp-team/marp-core/commit/61a1def244d1b6faa8e2c0be97ec0b68cab3ab49\n\n### Credits\n\nThanks to @Ry0taK for finding out this vulnerability.","aliases":["CVE-2024-56510"],"modified":"2024-12-26T21:45:58Z","published":"2024-12-26T18:25:25Z","database_specific":{"github_reviewed":true,"github_reviewed_at":"2024-12-26T18:25:25Z","nvd_published_at":"2024-12-26T21:15:06Z","cwe_ids":["CWE-79"],"severity":"MODERATE"},"references":[{"type":"WEB","url":"https://github.com/marp-team/marp-core/security/advisories/GHSA-x52f-h5g4-8qv5"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-56510"},{"type":"WEB","url":"https://github.com/marp-team/marp-core/pull/282"},{"type":"WEB","url":"https://github.com/marp-team/marp-core/commit/61a1def244d1b6faa8e2c0be97ec0b68cab3ab49"},{"type":"PACKAGE","url":"https://github.com/marp-team/marp-core"},{"type":"WEB","url":"https://github.com/marp-team/marp-core/releases/tag/v3.9.1"},{"type":"WEB","url":"https://github.com/marp-team/marp-core/releases/tag/v4.0.1"}],"affected":[{"package":{"name":"@marp-team/marp-core","ecosystem":"npm","purl":"pkg:npm/%40marp-team/marp-core"},"ranges":[{"type":"SEMVER","events":[{"introduced":"3.0.2"},{"fixed":"3.9.1"}]}],"database_specific":{"last_known_affected_version_range":"\u003c= 3.9.0","source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2024/12/GHSA-x52f-h5g4-8qv5/GHSA-x52f-h5g4-8qv5.json"}},{"package":{"name":"@marp-team/marp-core","ecosystem":"npm","purl":"pkg:npm/%40marp-team/marp-core"},"ranges":[{"type":"SEMVER","events":[{"introduced":"4.0.0"},{"fixed":"4.0.1"}]}],"versions":["4.0.0"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2024/12/GHSA-x52f-h5g4-8qv5/GHSA-x52f-h5g4-8qv5.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L"}]}