Resource exhaustion in Markedjs Marked
CVE-2022-21680
Marked is a markdown parser and compiler. Prior to version 4.0.10, the regular expression `block.def` may cause catastrophic backtracking against some strings and lead to a regular expression denial of service (ReDoS). Anyone who runs untrusted markdown through a vulnerable version of marked and does not use a worker with a time limit may be affected. This issue is patched in version 4.0.10. As a workaround, avoid running untrusted markdown through marked or run marked on a worker thread and set a reasonable time limit to prevent draining resources.
Vulnerability class: DoS (Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.029 (86.7th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 87th percentile — 86.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.029 · newest: 0.029 · change: 0.000
Affected products
- Markedjs Marked — versions < 4.0.10
- Marked Project
- Fedoraproject Fedora — versions 36
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/markedjs/marked/security/advisories/GHSA-rrrm-qjm4-v8hf (Exploit, Third Party Advisory)
- github.com/markedjs/marked/commit/c4a3ccd344b6929afa8a1d50ac54a721e57012c0 (Patch, Third Party Advisory)
- github.com/markedjs/marked/releases/tag/v4.0.10 (Third Party Advisory, Release Notes)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
Frequently asked questions
- What is CVE-2022-21680?
- CVE-2022-21680 is a high-severity vulnerability in Markedjs Marked, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2022-01-14.
- How severe is CVE-2022-21680?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2022-21680 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.