CVE-2021-32723

mediumpriority · track · 26EPSS 0.014 · 73 %ileEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

1.42% (73rd) EPSS

CVSS 4.3 · medium

Is it mine?

5 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · nvd

EPSS · scored 2026-10-27

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.

cvss

Technical severity, 0–10. One row per scoring source.

7.4

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 4.3–7.4

v2.04.3mediumAV:N/AC:M/Au:N/C:N/I:N/A:Pprimary · NVD / NIST USexploitability 8.6 · impact 2.9

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 2.8 · impact 3.6

v3.16.1mediumAV:N/AC:H/PR:N/UI:R/S:C/C:N/I:N/A:Hsecondary · FSTEC (BDU) RU

v3.17.4highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:Hsecondary · ENISA EU

v3.17.4highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:Hsecondary · security-advisories@github.comexploitability 2.8 · impact 4

v3.17.4highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:Hsecondary · OSV

v3.16mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-400USprimaryCWE-400USCWE-400USCWE-404US

affected products (5)

Products and version ranges known to be affected.

PrismJS prism≤ < 1.24enisa_euvdEU
Lea Verou Prism≤ 1.24fstec_bduRU
oracle application express< 21.1.4nvdUScpe:2.3:a:oracle:application_express:*:*:*:*:*:*:*:*
prismjs prism< 1.24.0nvdUScpe:2.3:a:prismjs:prism:*:*:*:*:*:*:*:*
npm prismjs< 1.24.0osvUSpkg:npm/prismjs

advisories (1)

Vendor and ecosystem advisories describing this.

GHSA-gj77-59wh-66hgRegular Expression Denial of Service (ReDoS) in Prism2021-06-28ghsa · osvUS
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

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu nvd osv NVD CVE.org MITRE

published 2021-06-28modified 2026-06-17

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references (14)

External citations — patches, advisories, analysis.

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