What is the CVSS score of CVE-2020-7767?

CVE-2020-7767 has a CVSS 3.1 base score of 5.3 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L. EPSS exploitation probability: 1.6%.

Is there a public PoC exploit available for CVE-2020-7767?

Yes, a public proof-of-concept exploit is available for CVE-2020-7767. Prioritise patching immediately. EPSS: 1.6%.

Express Validators CVE-2020-7767

MEDIUM

Uncontrolled Resource Consumption (CWE-400)

2020-11-11 report@snyk.io

Denial Of Service Express Validators

5.3

CVSS 3.1 · Vendor: snyk

Severity by source

Vendor (snyk) PRIMARY

5.3 MEDIUM

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

Primary rating from Vendor (snyk) · only source for this CVE.

CVSS VectorVendor: snyk

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

Low

Lifecycle Timeline

CVE Published

Nov 11, 2020 - 11:15 cve.org

MEDIUM 5.3

Blast Radius

ecosystem impact

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

3 npm packages depend on express-validators (3 direct, 0 indirect)

Ecosystem-wide dependent count for version 1.0.4.

DescriptionCVE.org

All versions of package express-validators are vulnerable to Regular Expression Denial of Service (ReDoS) when validating specifically-crafted invalid urls.

AnalysisAI

All versions of package express-validators are vulnerable to Regular Expression Denial of Service (ReDoS) when validating specifically-crafted invalid urls. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

Technical ContextAI

This vulnerability is classified as Uncontrolled Resource Consumption (CWE-400), which allows attackers to cause denial of service by exhausting system resources. All versions of package express-validators are vulnerable to Regular Expression Denial of Service (ReDoS) when validating specifically-crafted invalid urls. Affected products include: Express-Validators Project Express-Validators.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Implement rate limiting, set resource quotas, validate input sizes, use timeouts.