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CVE Record

CVE-2021-23343: Regular Expression Denial of Service (ReDoS)

All versions of package path-parse are vulnerable to Regular Expression Denial of Service (ReDoS) via splitDeviceRe, splitTailRe, and splitPathRe regular expressions. ReDoS exhibits polynomial worst-case time complexity.

MediumCVSS 5.3Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2021-23343 is a denial-of-service risk in the path-parse package. A specially formed path string can make vulnerable regular expressions consume excessive processing time, reducing service availability. The sources describe low availability impact only, not data theft or code execution.

Executive priority

Treat as routine but timely dependency remediation. Escalate if internet-facing services pass untrusted path strings into affected code or if dependency guidance confirms a straightforward upgrade path.

Technical view

The source bundle identifies ReDoS in path-parse regular expressions splitDeviceRe, splitTailRe, and splitPathRe, with polynomial worst-case time complexity. CVSS 3.1 is 5.3: network-reachable, low complexity, no privileges, no user interaction, and availability impact only.

Likely exposure

Exposure is most likely in JavaScript or WebJars applications that include path-parse directly or transitively and process untrusted path-like input. The affected CPE data is absent, and the bundle only names path-parse as the affected product.

Exploitation context

The bundle does not show CISA KEV listing or cited evidence of active exploitation. Public advisories and a GitHub issue document the weakness, but they do not establish observed exploitation in the provided sources.

Researcher notes

Evidence is limited to advisory metadata, CVSS, references, and the named vulnerable regexes. No CWE list, CPEs, exploit confirmation, or explicit fix version is included in the supplied bundle.

Mitigation direction

  • Inventory direct and transitive use of path-parse.
  • Check maintainer, Snyk, and CVE guidance for current fixed versions.
  • Reduce attacker-controlled input reaching path parsing code.
  • Apply dependency updates through normal change control.
  • Monitor dependency advisories for this package.

Validation and detection

  • Review SBOMs and lockfiles for path-parse.
  • Check WebJars dependencies for org.webjars.npm path-parse packaging.
  • Identify routes accepting path-like user input.
  • Confirm no public route depends on vulnerable parsing behavior.
  • Track KEV and vendor advisory changes.
Prepared
Confidence
medium
Sources
6

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

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CVE-2021-23343 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
5.3 (3.1)
Known Exploited
No
Published

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

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
0Timeline events
0ADP providers
5Source links

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
5.3CVSS 3.1MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L3.91.4Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

5.3Medium
CVSS 3.1 vector shape for CVE-2021-23343Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

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

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/apath-parse0Listed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.