5.3

CVE-2021-23368: postcss

CVSS: 5.3v3.1MediumModified
AliasesUBUNTU-CVE-2021-23368DEBIAN-CVE-2021-23368GHSA-hwj9-h5mp-3pm3
Published 12-04-2021Last modified 16-09-2024
Open JSON

Vulnerability summary

CVE-2021-23368 is a medium (CVSS 5.3) vulnerability in postcss. EPSS estimates a 3.51% chance of exploitation in the next 30 days, higher than 89% of scored vulnerabilities. 2 public exploits are recorded.

Overall risk
32/100
0100
Medium · default modelHow is this calculated?
CVSS score
5.3/10
010
Medium · v3.1 (CVE.org)
EPSS score
3.51%
0%100%
Low · -0.03 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits2reference

Timeline

  1. 12-04-2021
    PublishedVulnerability first disclosed.
  2. 16-09-2024
    Last modifiedVulnerability information updated.

Description

The package postcss from 7.0.0 and before 8.2.10 are vulnerable to Regular Expression Denial of Service (ReDoS) during source map parsing.

CVSS metrics

6 scores · 5 sources · 2 versions

EPSS trend

Probability

3.51%

Chance of exploitation in the next 30 days

Percentile

89%

Versus all other CVEs

30-day change

-0.03 pp

From 3.54% on 19-09-2026

19-09-202619-10-2026
EPSS score
3.51%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

2 found
  • referenceUnverified

    Exploit Reference (snyk.io)

    Maturity: unknown

  • referenceUnverified

    Exploit Reference (snyk.io)

    Maturity: unknown

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Debian1 product
  • node-postcss< 8.2.1+~cs5.3.23-6
Npm1 product
  • postcss≥ 7.0.0, < 7.0.36 | ≥ 8.0.0, < 8.2.10
Postcss1 product
  • postcss≥ 7.0.0, < 7.0.36 | ≥ 8.0.0, < 8.2.10
Ubuntu1 product
  • node-postcssAll versions (No fix recorded)

4 vendors · 4 products

References

21 links
Show all 21 references