CVE-2021-32723 HIGH

CVE-2021-32723: Regular Expression Denial of Service (ReDoS) in Prism

Vendor Prismjs
Product prism
Weakness CWE-400
Published June 28, 2021
Last update August 3, 2024
View on NVD All CVEs

CVSS base score

7.4/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Confidentiality None
Integrity None

CVSS vector

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

What the vulnerability does

01Description

Prism is a syntax highlighting library. Some languages before 1.24.0 are vulnerable to Regular Expression Denial of Service (ReDoS). When Prism is used to highlight untrusted (user-given) text, an attacker can craft a string that will take a very very long time to highlight. This problem has been fixed in Prism v1.24. As a workaround, do not use ASCIIDoc or ERB to highlight untrusted text. Other languages are not affected and can be used to highlight untrusted text.

Key dates

02Disclosure timeline

June 28, 2021 CVE published
August 3, 2024 Record updated