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Vulnerability details: VCID-zfzz-5p91-j7g9
Vulnerability ID VCID-zfzz-5p91-j7g9
Aliases CVE-2021-23382
GHSA-566m-qj78-rww5
Summary Regular Expression Denial of Service in postcss
Status Published
Exploitability 0.5
Weighted Severity 6.2
Risk 3.1
Affected and Fixed Packages Package Details
Weaknesses (4)
CWE-400 Uncontrolled Resource Consumption
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
CWE-1333 Inefficient Regular Expression Complexity
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
cvssv3 5.3 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-23382.json
epss 0.00074 https://api.first.org/data/v1/epss?cve=CVE-2021-23382
epss 0.00074 https://api.first.org/data/v1/epss?cve=CVE-2021-23382
epss 0.00074 https://api.first.org/data/v1/epss?cve=CVE-2021-23382
epss 0.00074 https://api.first.org/data/v1/epss?cve=CVE-2021-23382
cvssv3.1_qr MODERATE https://github.com/advisories/GHSA-566m-qj78-rww5
cvssv3.1 5.3 https://github.com/postcss/postcss/commit/2b1d04c867995e55124e0a165b7c6622c1735956
generic_textual MODERATE https://github.com/postcss/postcss/commit/2b1d04c867995e55124e0a165b7c6622c1735956
cvssv3.1 5.3 https://github.com/postcss/postcss/releases/tag/7.0.36
generic_textual MODERATE https://github.com/postcss/postcss/releases/tag/7.0.36
cvssv3.1 5.3 https://nvd.nist.gov/vuln/detail/CVE-2021-23382
generic_textual MODERATE https://nvd.nist.gov/vuln/detail/CVE-2021-23382
cvssv3.1 5.3 https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1255641
generic_textual MODERATE https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1255641
cvssv3.1 5.3 https://snyk.io/vuln/SNYK-JS-POSTCSS-1255640
generic_textual MODERATE https://snyk.io/vuln/SNYK-JS-POSTCSS-1255640
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-23382.json
https://api.first.org/data/v1/epss?cve=CVE-2021-23382
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-23382
https://github.com/postcss/postcss/commit/2b1d04c867995e55124e0a165b7c6622c1735956
https://github.com/postcss/postcss/releases/tag/7.0.36
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1255641
https://snyk.io/vuln/SNYK-JS-POSTCSS-1255640
1954150 https://bugzilla.redhat.com/show_bug.cgi?id=1954150
CVE-2021-23382 https://nvd.nist.gov/vuln/detail/CVE-2021-23382
GHSA-566m-qj78-rww5 https://github.com/advisories/GHSA-566m-qj78-rww5
RHSA-2021:2438 https://access.redhat.com/errata/RHSA-2021:2438
RHSA-2021:3917 https://access.redhat.com/errata/RHSA-2021:3917
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-23382.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Found at https://github.com/postcss/postcss/commit/2b1d04c867995e55124e0a165b7c6622c1735956
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Found at https://github.com/postcss/postcss/releases/tag/7.0.36
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Found at https://nvd.nist.gov/vuln/detail/CVE-2021-23382
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Found at https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1255641
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Found at https://snyk.io/vuln/SNYK-JS-POSTCSS-1255640
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.22573
EPSS Score 0.00074
Published At June 11, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-11T20:27:31.086646+00:00 GHSA Importer Import https://github.com/advisories/GHSA-566m-qj78-rww5 38.6.0