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CVE-2021-23341

24
FAUCET Score

CVE-2021-23341 describes a Regular Expression Denial of Service (ReDoS) vulnerability affecting prismjs versions prior to 1.23.0, specifically impacting the prism-asciidoc, prism-rest, prism-tap, and prism-eiffel components. This vulnerability carries a CVSS score of 7.5 (HIGH), indicating it can be exploited remotely with low attack complexity, leading to a complete denial of service. There is currently no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.23.0CPE matchmatch criteria
cpe:2.3:a:prismjs:prism:*:*:*:*:*:node.js:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
3.17%
Probability of exploitation in next 30 days
EPSS Percentile
86.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0317 is in the 76th percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (7)

github_advisorypatch availablevia nvd_reference
View patch
npmpatch availablevia ghsa
Product: prismjsFixed in: 1.23.0
redhatend of lifevia redhat_api
Product: OpenShift Service Mesh 2.0Fixed in: servicemesh-grafana
redhatend of lifevia redhat_api
Product: Red Hat Ceph Storage 3Fixed in: grafana
redhatend of lifevia redhat_api
Product: Red Hat Ceph Storage 4Fixed in: rhceph/rhceph-4-dashboard-rhel8
redhatend of lifevia redhat_api
Product: Red Hat OpenShift Container Platform 3.11Fixed in: openshift3/grafana
redhatend of lifevia redhat_api
Product: Red Hat OpenShift Container Platform 4Fixed in: openshift4/ose-grafana

Vendor Advisories (2)

npmGHSA-h4hr-7fg3-h35whigh

Denial of service in prismjs

Mar 1, 2021
redhatCVE-2021-23341Moderate

nodejs-prismjs: Regular expression denial of service via prism-asciidoc prism-rest prism-tap and prism-eiffel components

Feb 18, 2021

References

github.com / PrismJS/prism/commit/c2f6a64426f44497a675cb32dccb079b3eff1609
PatchThird Party Advisory
github.com / PrismJS/prism/issues/2583
ExploitPatchThird Party Advisory
github.com / PrismJS/prism/pull/2584
PatchThird Party Advisory
snyk.io / vuln/SNYK-JAVA-ORGWEBJARS-1076583
ExploitThird Party Advisory
snyk.io / vuln/SNYK-JAVA-ORGWEBJARSNPM-1076582
ExploitThird Party Advisory
snyk.io / vuln/SNYK-JS-PRISMJS-1076581
ExploitThird Party Advisory