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No exploitation reportedFix available

CVE-2021-23382

No exploitation reported by the sources we read.

  • Published2021-04-26
  • Fixed in8.2.13 · 7.0.36
  • WeaknessCWE-1333

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

The package postcss before 8.2.13 are vulnerable to Regular Expression Denial of Service (ReDoS) via getAnnotationURL() and loadAnnotation() in lib/previous-map.js. The vulnerable regexes are caused mainly by the sub-pattern \/\*\s* sourceMappingURL=(.*).

Timeline

dates in UTC
  1. 2021-04-2616:15CVE publishedNVD

Versions per branch

NVD · OSV
Postcss
BranchAffectedFixed in
8.x≥ 8.0.0, < 8.2.138.2.13
7.0< 7.0.367.0.36

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • @rootio/postcssRoot:npmall versions · fixed in 5.2.18-root.io.1
  • @rootio/postcssRoot:npmall versions · fixed in 5.2.18-root.io.2
  • @rootio/postcssRoot:npmall versions · fixed in 5.2.18-root.io.3
  • @rootio/postcssRoot:npmall versions · fixed in 5.2.18-root.io.4
  • @rootio/postcssRoot:npmall versions · fixed in 5.2.18-root.io.5
  • @rootio/postcssRoot:npmall versions · fixed in 7.0.36-root.io.1
  • node-postcssUbuntu:22.04:LTSall versions · no fixed version listed
  • node-postcssUbuntu:20.04:LTSall versions · no fixed version listed

16 more package ranges on OSV.dev

Vendor advisories

  • CVE-2021-23382 Red Hat Product Security4 products fixed · 15 known affected

    nodejs-postcss: ReDoS via getAnnotationURL() and loadAnnotation() in lib/previous-map.js

    openshift-logging/kibana6-rhel8 as a component of Logging Subsystem for Red Hat OpenShift · servicemesh-grafana as a component of OpenShift Service Mesh 2.0 · servicemesh-grafana-prometheus as a component of OpenShift Service Mesh 2.0 · +12 more

  • RHSA-2021:3917 Red Hat Product Security1 product fixed

    Red Hat Security Advisory: Red Hat Quay v3.6.0 security, bug fix and enhancement update

  • RHSA-2021:2438 Red Hat Product Security3 products fixed

    Red Hat Security Advisory: OpenShift Container Platform 4.8.2 bug fix and security update

Full record on NVD

Fix

  1. Update Postcss to 8.2.13 · 7.0.36
  2. Vendor fix Red Hat Product Security RHSA-2021:3917 · 1 productFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
  3. Vendor fix Red Hat Product Security RHSA-2021:2438 · 3 productsFor OpenShift Container Platform 4.8 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update: https://docs.openshift.com/container-platform/4.8/release_notes/ocp-4-8-r…
  4. No fix available, says the vendor Red Hat Product Security CVE-2021-23382 · 7 productsFix deferred
  5. No fix available, says the vendor Red Hat Product Security CVE-2021-23382 · 6 productsAffected
  6. No fix planned, says the vendor Red Hat Product Security CVE-2021-23382 · 2 productsWill not fix

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

  • CNACVSS 3.15.3known since 2026-10-23
  • NVDCVSS 3.17.5read 2026-10-23
  • NVDCVSS 2.05read 2026-10-23
  • NVDweakness (CWE)CWE-1333read 2026-10-23
  • FIRST EPSSEPSS score2.6 %2026-11-08
  • OSVaffected packages—
  • GitHub AdvisoriesadvisoryMODERATE2021-05-20

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
2021-04-26
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-566m-qj78-rww5

Frequently asked questions

What is CVE-2021-23382?

The package postcss before 8.2.13 are vulnerable to Regular Expression Denial of Service (ReDoS) via getAnnotationURL() and loadAnnotation() in lib/previous-map.js. The vulnerable regexes are caused mainly by the sub-pattern \/\*\s* sourceMappingURL=(.*).

Is CVE-2021-23382 actively exploited?

Active exploitation of CVE-2021-23382 has not been confirmed. Its EPSS score was 2.6% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-23382?

CVE-2021-23382 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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