CVE-2021-32723

Regular Expression Denial of Service (ReDoS) in Prism

Description

Some languages before 1.24.0 are vulnerable to Regular Expression Denial of Service (ReDoS).

Impact

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. Do not use the following languages to highlight untrusted text.

ASCIIDoc
ERB

Other languages are not affected and can be used to highlight untrusted text.

Patches

This problem has been fixed in Prism v1.24.

References

PrismJS/prism#2774
PrismJS/prism#2688

Patch Available

Fix available through Seal Security.  
No upgrade required, protect your application instantly.

Fix without upgrading

Score

Severity

Ecosystem

JavaScript

Publish Date

June 28, 2021

Modified Date

November 7, 2023

Score Vector

Affected Versions