CVE-2021-23341

HIGHNVD 7.57.5—

7.5

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.

CVSS v3: 7.5
EG Score: 7.5(medium)
EPSS: 82.9%
KEV: Not listed

Published

February 18, 2021

Last Modified

November 21, 2024

References (12)

report@snykhttps://github.com/PrismJS/prism/commit/c2f6a64426f44497a675cb32dccb079b3eff1609
report@snykhttps://github.com/PrismJS/prism/issues/2583
report@snykhttps://github.com/PrismJS/prism/pull/2584
report@snykhttps://snyk.io/vuln/SNYK-JAVA-ORGWEBJARS-1076583
report@snykhttps://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1076582
report@snykhttps://snyk.io/vuln/SNYK-JS-PRISMJS-1076581
af854a3a-2127-422b-91ae-364da2661108https://github.com/PrismJS/prism/commit/c2f6a64426f44497a675cb32dccb079b3eff1609
af854a3a-2127-422b-91ae-364da2661108https://github.com/PrismJS/prism/issues/2583
af854a3a-2127-422b-91ae-364da2661108https://github.com/PrismJS/prism/pull/2584
af854a3a-2127-422b-91ae-364da2661108https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARS-1076583
af854a3a-2127-422b-91ae-364da2661108https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1076582
af854a3a-2127-422b-91ae-364da2661108https://snyk.io/vuln/SNYK-JS-PRISMJS-1076581

Affected Packages

(1 across 1 ecosystem)

npm(1)

Package	Vulnerable range	Fixed in	Dependents
prismjs	—	1.23.0	—

Data Freshness Timeline

(refreshed 11× in last 7d / 19× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:11 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-29 13:42 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-26 20:39 UTCEG score recompute
2026-05-26 13:42 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-25 16:16 UTCOSV refresh
2026-05-24 16:49 UTCepss_batch

Frequently asked(5)

What is CVE-2021-23341?

CVE-2021-23341 is a high vulnerability published on February 18, 2021. 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.

When was CVE-2021-23341 disclosed?

CVE-2021-23341 was first published in the National Vulnerability Database on February 18, 2021, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-23341 actively exploited?

CVE-2021-23341 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 82.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-23341?

CVE-2021-23341 has a CVSS v3 base score of 7.5 (NVD).

How do I remediate CVE-2021-23341?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-23341, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2021-23341

📅 Published

🔄 Last Modified

🔗 References (12)