CVE-2021-23341

Name: CVE-2021-23341
Creator: NVD / NIST
Published: 2021-02-18T16:15:14.143+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 3.17%

Last modified Jun 17, 2026

CVE-2021-23341 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. The package prismjs before 1.23.0 are vulnerable to Regular Expression Denial of Service (ReDoS) via the prism-asciidoc, prism-rest, prism-tap and prism-eiffel components.. EPSS estimates a 3.17% chance of exploitation in the next 30 days.

Description

The package prismjs before 1.23.0 are vulnerable to Regular Expression Denial of Service (ReDoS) via the prism-asciidoc, prism-rest, prism-tap and prism-eiffel components.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

3.17%

86.4th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Prismjs	Prism	< 1.23.0

References

https://github.com/PrismJS/prism/commit/c2f6a64426f44497a675cb32dccb079b3eff1609Patch, Third Party Advisory
https://github.com/PrismJS/prism/issues/2583Exploit, Patch, Third Party Advisory
https://github.com/PrismJS/prism/pull/2584Patch, Third Party Advisory
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARS-1076583Exploit, Third Party Advisory
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1076582Exploit, Third Party Advisory
https://snyk.io/vuln/SNYK-JS-PRISMJS-1076581Exploit, Third Party Advisory
https://github.com/PrismJS/prism/commit/c2f6a64426f44497a675cb32dccb079b3eff1609Patch, Third Party Advisory
https://github.com/PrismJS/prism/issues/2583Exploit, Patch, Third Party Advisory
https://github.com/PrismJS/prism/pull/2584Patch, Third Party Advisory
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARS-1076583Exploit, Third Party Advisory
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1076582Exploit, Third Party Advisory
https://snyk.io/vuln/SNYK-JS-PRISMJS-1076581Exploit, Third Party Advisory

Timeline

Published: Feb 18, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-23341?

The package prismjs before 1.23.0 are vulnerable to Regular Expression Denial of Service (ReDoS) via the prism-asciidoc, prism-rest, prism-tap and prism-eiffel components.

How severe is CVE-2021-23341?

CVE-2021-23341 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 3.17% probability of exploitation in the next 30 days.

How do I fix CVE-2021-23341?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-23341?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST