What is CVE-2021-21306?

CVE-2021-21306 is a medium-severity vulnerability in Markedjs Marked, classified under Uncontrolled Resource Consumption. CVSS score: 5.3/10. Published 2021-02-08.

How severe is CVE-2021-21306?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Is CVE-2021-21306 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Resource exhaustion in Markedjs Marked

CVE-2021-21306

Marked is an open-source markdown parser and compiler (npm package "marked"). In marked from version 1.1.1 and before version 2.0.0, there is a Regular expression Denial of Service vulnerability. This vulnerability can affect anyone who ru…

Vulnerability class: DoS (Denial of Service)

EPSS: 0.006 (70.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

Affected products

Markedjs Marked — versions >= 1.1.1, < 2.0.0

Weakness classification (CWE)

CWE-400 — Uncontrolled Resource Consumption

Public proof-of-concept exploits

engn33r/awesome-redos-security

References

github.com/markedjs/marked/security/advisories/GHSA-4r62-v4vq-hr96 (x_refsource_CONFIRM)
github.com/markedjs/marked/issues/1927 (x_refsource_MISC)
github.com/markedjs/marked/pull/1864 (x_refsource_MISC)
github.com/markedjs/marked/commit/7293251c438e3ee968970f7609f1a27f9007bccd (x_refsource_MISC)
www.npmjs.com/package/marked (x_refsource_MISC)

Frequently asked questions

What is CVE-2021-21306?: CVE-2021-21306 is a medium-severity vulnerability in Markedjs Marked, classified under Uncontrolled Resource Consumption. CVSS score: 5.3/10. Published 2021-02-08.
How severe is CVE-2021-21306?: Medium severity. CVSS v3 base score is 5.3 out of 10.
Is CVE-2021-21306 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.