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CVE-2021-23368

Regular Expression Denial of Service (ReDoS)

No known exploitation. EPSS puts it in the 89th percentile. Fixed versions are out.

CVSS 3.15.3MediumEPSS percentile89th3.5% chance in 30 daysCISA KEVNot listedNo confirmed exploitation
No public exploit knownFix4 products3 fixed builds listed below
Check it yourself

OpenVAS · 5 checks

e.g. OID 1.3.6.1.4.1.25623.1.0.117733

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Published Updated Sources: CVE.org, NVD, GitHub, BDU

NVD CVE.org

What to do

Find your product and version, then upgrade to the build on the right.

  • N/a PostcssAffected: ≥ 7.0.0, < unspecifiedUpgrade to: unspecifiedAffected: ≥ unspecified, < 8.2.10Upgrade to: 8.2.10Stated by: CVE record
  • Npm PostcssAffected: ≥ 7.0.0, < 7.0.36Upgrade to: 7.0.36Stated by: GitHub advisory
  • PostcssAffected: ≥ 7.0.0, < 7.0.36Upgrade to: 7.0.36Stated by: NVD
  • ООО "Открытая мобильная платформа" Аврора ЦентрAffected: от 2.1.3 до 2.5.0 включительноUpgrade to: not statedStated by: BDU

Versions as the sources state them. Full version matrix after sign-in

Check it yourselfA free OpenVAS check exists for this CVE. Run it against your hosts.Is your organisation exposed?Request an assessment to establish which checks fit your systems.

What it is

From the CVE record

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.

In plain language

No plain-language summary for this CVE yet.

Exploitation

Where each signal puts this CVE on the scale from published to confirmed exploited.

EPSS89th
CISA KEV

Not in the catalog. CISA has not confirmed exploitation.

Public exploits

No public exploit or proof of concept found in the sources we track.

EPSS

3.5% chance of exploitation activity in the next 30 days, which ranks it in the 89th percentile of scored CVEs.

Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.

Lifecycle

5 events over 1900 days, from the signal feeds we watch.

  1. OpenVAS check added
  2. Patch availablerecord updated
  3. Publishedweakness classified

Affected products

And 1 more affected product. See all after sign-in

Technical detail

CVSS 3.1 vector

Open in the CVSS calculator

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Scored 5.3 by NVD.

How it is reached

  • Attack Vector NetworkExploitable remotely over the network without any special conditions
  • Attack Complexity LowNo special conditions — the attack can be reliably reproduced
  • Privileges Required NoneNo authentication required — anyone can exploit this
  • User Interaction NoneNo user interaction needed — fully automated exploitation

Scope

  • Scope UnchangedImpact is limited to the vulnerable component itself

Impact if exploited

  • Confidentiality NoneNo confidentiality impact
  • Integrity NoneNo integrity impact
  • Availability LowReduced performance or intermittent disruption of service

Weaknesses

Sources

References in the record

And 16 more references. See all after sign-in

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We'll flag the next CVE, public exploit or patch for Postcss, not every advisory.