CVE-2020-5238

MediumCVSS 6.5/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 6.5/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-20

Affected software

No affected versions have been published.

Timeline

Published: Jul 1, 2020
Last modified: Jun 17, 2026
NVD status: Modified

Related CVEs from 2020

CVE-2020-52398.8In Mailu before version 1.7, an authenticated user can exploit a vulnerability in Mailu fetchmail script and gain full access to a Mailu ins CVE-2020-52408.5In wagtail-2fa before 1.4.1, any user with access to the CMS can view and delete other users 2FA devices by going to the correct path. The u CVE-2020-52415.4matestack-ui-core (RubyGem) before 0.7.4 is vulnerable to XSS/Script injection. This vulnerability is patched in version 0.7.4.CVE-2020-52428.8openHAB before 2.5.2 allow a remote attacker to use REST calls to install the EXEC binding or EXEC transformation service and execute arbitr CVE-2020-52437.5uap-core before 0.7.3 is vulnerable to a denial of service attack when processing crafted User-Agent strings. Some regexes are vulnerable to CVE-2020-52447.5In BuddyPress before 5.1.2, requests to a certain REST API endpoint can result in private user data getting exposed. Authentication is not n CVE-2020-52458.8Dropwizard-Validation before 1.3.19, and 2.0.2 may allow arbitrary code execution on the host system, with the privileges of the Dropwizard CVE-2020-52466.5Traccar GPS Tracking System before version 4.9 has a LDAP injection vulnerability. It occurs when user input is being used in LDAP search fi CVE-2020-52477.5In Puma (RubyGem) before 4.3.2 and before 3.12.3, if an application using Puma allows untrusted input in a response header, an attacker can CVE-2020-52485.3GLPI before before version 9.4.6 has a vulnerability involving a default encryption key. GLPIKEY is public and is used on every instance. Th CVE-2020-52496.5In Puma (RubyGem) before 4.3.3 and 3.12.4, if an application using Puma allows untrusted input in an early-hints header, an attacker can use CVE-2020-52506.3In PrestaShop before version 1.7.6.4, when a customer edits their address, they can freely change the id_address in the form, and thus steal