Script execution via HTML comment sanitizer bypass
Published Dec 26, 2024 · Updated Dec 27, 2024
Cross-site scripting in Marp Core 3.0.2 through 3.9.0 and 4.0.0 allows attackers to execute script through crafted Markdown. The built-in allowlist sanitizer mishandles input containing insufficient HTML comments and emits unsanitized markup into rendered slide HTML. The default allowlist must be active and a user must render and view the attacker-controlled presentation, enabling script execution in that viewing context.
Summary
What happened
Cross-site scripting in Marp Core 3.0.2 through 3.9.0 and 4.0.0 allows attackers to execute script through crafted Markdown. The built-in allowlist sanitizer mishandles input containing insufficient HTML comments and emits unsanitized markup into rendered slide HTML. The default allowlist must be active and a user must render and view the attacker-controlled presentation, enabling script execution in that viewing context.
The record
- CVE
- CVE-2024-56510
- Published
- Dec 26, 2024
- Updated
- Dec 27, 2024
- Vendor
- Marp Team
- Product
- Marp Core
- Classifications
- CWE-79, T1203
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Dec 26, 2024CVE publishedPublication date reported by the CVE source.
- Dec 27, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=>= 3.0.2, < 3.9.1
- Affected versionversion=>= 4.0.0, < 4.0.1
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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