CVE-2022-21680 is a Regular Expression Denial of Service (ReDoS) vulnerability affecting the Marked markdown parser, specifically versions prior to 4.0.10, and related Fedora projects. An attacker can exploit this by providing specially crafted, untrusted markdown that causes catastrophic backtracking in the `block.def` regular expression. This vulnerability carries a CVSS score of 7.5 (High), indicating a network-based attack with low complexity that can lead to a complete denial of service. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 4.0.10CPE matchmatch criteria | cpe:2.3:a:marked_project:marked:*:*:*:*:*:node.js:*:* | ||
36CPE matchmatch criteria | cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.