CVE-2024-56510
Marp Core allows XSS by improper neutralization of HTML sanitization
@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.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- Low
Exploit likelihood
What each source reports
CVE List Score used
Marp Core allows XSS by improper neutralization of HTML sanitization
@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.
- Record
CVE-2024-56510- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L - Weakness
- CWE-79
- Updated
- 2026-11-02
EUVDEUVD-2024-3621
@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.
- Record
EUVD-2024-3621- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-x52f-h5g4-8qv5
Marp Core allows XSS by improper neutralization of HTML sanitization
Marp Core (@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.
Impact
Marp 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).
Patches
Marp Core v3.9.1 and v4.0.1 have been patched to fix that.
Workarounds
If you are unable to update the package immediately, disable all HTML tags by setting html: false option in the Marp class constructor.
const marp = new Marp({ html: false })
References
- CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
- https://github.com/marp-team/marp-core/pull/282
- https://github.com/marp-team/marp-core/commit/61a1def244d1b6faa8e2c0be97ec0b68cab3ab49
Credits
Thanks to @Ry0taK for finding out this vulnerability.
- Record
GHSA-x52f-h5g4-8qv5- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L - Weakness
- CWE-79
- Updated
- 2026-11-02
NVD
@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.
- Record
CVE-2024-56510- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L - Weakness
- CWE-79
- Updated
- 2026-11-02
OSV
Marp Core allows XSS by improper neutralization of HTML sanitization
@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.
- Record
CVE-2024-56510- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L - Weakness
- CWE-79
- Updated
- 2026-11-02
OSVGHSA-x52f-h5g4-8qv5
Marp Core allows XSS by improper neutralization of HTML sanitization
Marp Core (@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.
Impact
Marp 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).
Patches
Marp Core v3.9.1 and v4.0.1 have been patched to fix that.
Workarounds
If you are unable to update the package immediately, disable all HTML tags by setting html: false option in the Marp class constructor.
const marp = new Marp({ html: false })
References
- CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
- https://github.com/marp-team/marp-core/pull/282
- https://github.com/marp-team/marp-core/commit/61a1def244d1b6faa8e2c0be97ec0b68cab3ab49
Credits
Thanks to @Ry0taK for finding out this vulnerability.
- Record
GHSA-x52f-h5g4-8qv5- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L - Weakness
- CWE-79
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
@marp-team/marp-corenpm |
3.0.2 to 3.9.0 | 3.9.1 |
@marp-team/marp-corenpm |
4.0.0 to 4.0.0 | 4.0.1 |
@marp-team/marp-corenpm |
3.0.2 up to 3.9.1 | 3.9.1 |
@marp-team/marp-corenpm |
4.0.0 up to 4.0.1 | 4.0.1 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2024-56510 is a medium vulnerability (CVSS 5.3) in Marp-team Marp-core, published December 26, 2024. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.32%, the 24th percentile. Fixed in @marp-team/marp-core 3.9.1.
References
github.com/marp-team/marp-core/security/advisories/GHSA-x52f-h5g4-8qv5
nvd.nist.gov/vuln/detail/CVE-2024-56510