VulnerabilityModified

CVE-2020-5238

An attacker could craft a markdown table which would take an unreasonably long time to process, causing a denial of service.

MEDIUM 6.5EPSS 1.57%

Does this matter?

Lower severity and a low EPSS score (1.57%). Track it; it rarely justifies an emergency change on its own.

Description

The table extension in GitHub Flavored Markdown before version 0.29.0.gfm.1 takes O(n * n) time to parse certain inputs. An attacker could craft a markdown table which would take an unreasonably long time to process, causing a denial of service. This issue does not affect the upstream cmark project. The issue has been fixed in version 0.29.0.gfm.1.

CVSS 3.1: 6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS: 1.57% probability · 74th percentile
CISA KEV: Not listed
Weakness: CWE-20
Affected: github flavored markdown project/github flavored markdown · fedoraproject/fedora
Source: security-advisories@github.com

References

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.