CVE-2023-39663

Publication date 29 August 2023

Last updated 4 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

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 end of standard support, was ignored [not a vulnerability]
	18.04 LTS bionic	Ignored end of standard support
	16.04 LTS xenial	Ignored end of standard support
	14.04 LTS trusty	Ignored end of standard support

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

CVSS version: CVSS v3.0

Base score 7.5 · High

Base metrics

Parameter	Value
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality impact	None
Integrity impact	None
Availability impact	High

Scores

Parameter	Value
Base score	7.5 · High
Exploitability score	-
Impact score	-

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