CVE-2023-39663

Publication date 29 August 2023

Last updated 4 August 2025

Ubuntu priority

Cvss 3 Severity Score

Mathjax up to v2.7.9 was discovered to contain two Regular expression Denial of Service (ReDoS) vulnerabilities in MathJax.js via the components pattern and markdownPattern. NOTE: the vendor disputes this because the regular expressions are not applied to user input; thus, there is no risk.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
mathjax	23.04 lunar	Ignored end of life, was ignored [not a vulnerability]
	22.04 LTS jammy	Ignored not a vulnerability
	20.04 LTS focal	Ignored not a vulnerability
	18.04 LTS bionic	Ignored not a vulnerability
	16.04 LTS xenial	Ignored not a vulnerability
	14.04 LTS trusty	Ignored not a vulnerability

Notes

alexmurray

Upstream dispute this CVE since these components are internal to MathJax.js and cannot be influenced by a user / attacker so there is no way to abuse this as a ReDoS

Severity score breakdown

Parameter	Value
Base score	7.5 · High
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H