What is the CVSS score of CVE-2021-23490?

CVE-2021-23490 has a CVSS 3.1 base score of 7.5 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. EPSS exploitation probability: 1.8%.

Is there a public PoC exploit available for CVE-2021-23490?

Yes, a public proof-of-concept exploit is available for CVE-2021-23490. Prioritise patching immediately. EPSS: 1.8%.

Is there a patch available for CVE-2021-23490?

Yes, a patch is available for CVE-2021-23490. Update the affected software to the latest version immediately.

Parse Link Header CVE-2021-23490

HIGH

Inefficient Regular Expression Complexity (ReDoS) (CWE-1333)

2021-12-24 report@snyk.io

Denial Of Service Parse Link Header

7.5

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

7.5 HIGH

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Lifecycle Timeline

CVE Published

Dec 24, 2021 - 20:15 nvd

HIGH 7.5

Blast Radius

ecosystem impact

† from your stack dependencies † transitive graph · vuln.today resolves 4-path depth

256 npm packages depend on parse-link-header (130 direct, 129 indirect)

Ecosystem-wide dependent count for version 2.0.0.

DescriptionNVD

The package parse-link-header before 2.0.0 are vulnerable to Regular Expression Denial of Service (ReDoS) via the checkHeader function.

AnalysisAI

The package parse-link-header before 2.0.0 are vulnerable to Regular Expression Denial of Service (ReDoS) via the checkHeader function. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.

Technical ContextAI

This vulnerability is classified under CWE-1333. The package parse-link-header before 2.0.0 are vulnerable to Regular Expression Denial of Service (ReDoS) via the checkHeader function. Affected products include: Parse-Link-Header Project Parse-Link-Header. Version information: before 2.0.0.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.