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CVE-2021-37699

MEDIUM
Published 2021-08-11T23:15:10
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CVSS Score

V3.1
6.9
/10
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:N
Base Score Metrics
Exploitability: N/A Impact: N/A

EPSS Score

v2025.03.14
0.004
probability
of exploitation in the wild

There is a 0.4% chance that this vulnerability will be exploited in the wild within the next 30 days.

Updated: 2025-06-25
Exploit Probability
Percentile: 0.616
Higher than 61.6% of all CVEs

Attack Vector Metrics

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED

Impact Metrics

Confidentiality
HIGH
Integrity
LOW
Availability
NONE

Description

Next.js is an open source website development framework to be used with the React library. In affected versions specially encoded paths could be used when pages/_error.js was statically generated allowing an open redirect to occur to an external site. In general, this redirect does not directly harm users although can allow for phishing attacks by redirecting to an attacker's domain from a trusted domain. We recommend everyone to upgrade regardless of whether you can reproduce the issue or not. The issue has been patched in release 11.1.0.

Understanding This Vulnerability

This Common Vulnerabilities and Exposures (CVE) entry provides detailed information about a security vulnerability that has been publicly disclosed. CVEs are standardized identifiers assigned by MITRE Corporation to track and catalog security vulnerabilities across software and hardware products.

The severity rating (MEDIUM) indicates the potential impact of this vulnerability based on the CVSS (Common Vulnerability Scoring System) framework. Higher severity ratings typically indicate vulnerabilities that could lead to more significant security breaches if exploited. Security teams should prioritize remediation efforts based on severity, exploit availability, and the EPSS (Exploit Prediction Scoring System) score, which predicts the likelihood of exploitation in the wild.

If this vulnerability affects products or systems in your infrastructure, we recommend reviewing the affected products section, checking for available patches or updates from vendors, and implementing recommended workarounds or solutions until a permanent fix is available. Organizations should also monitor security advisories and threat intelligence feeds for updates about active exploitation of this vulnerability.

Available Exploits

No exploits available for this CVE.

Related News

No news articles found for this CVE.

Affected Products

References

EU Vulnerability Database

Monitored by ENISA for EU cybersecurity

EU Coordination

Not EU Coordinated

Exploitation Status

No Known Exploitation

ENISA Analysis

Malicious code in bioql (PyPI)

Affected Products (ENISA)

vercel
next.js

ENISA Scoring

CVSS Score (3.1)

6.9
/10
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:N

EPSS Score

0.450
probability

Data provided by ENISA EU Vulnerability Database. Last updated: October 3, 2025

GitHub Security Advisories

Community-driven vulnerability intelligence from GitHub

✓ GitHub Reviewed MODERATE

Open Redirect in Next.js

GHSA-vxf5-wxwp-m7g9

Advisory Details

Next.js is an open source website development framework to be used with the React library. In affected versions specially encoded paths could be used when `pages/_error.js` was statically generated, allowing an open redirect to occur to an external site. In general, this redirect does not directly harm users although it can allow for phishing attacks by redirecting to an attacker's domain from a trusted domain. ### Impact - **Affected:** Users of Next.js between `10.0.5` and `10.2.0` - **Affected:** Users of Next.js between `11.0.0` and `11.0.1` using `pages/_error.js` without `getInitialProps` - **Affected:** Users of Next.js between `11.0.0` and `11.0.1` using `pages/_error.js` and `next export` - **Not affected**: Deployments on Vercel ([vercel.com](https://vercel.com)) are not affected - **Not affected:** Deployments **with** `pages/404.js` - Note that versions prior to 0.9.9 package `next` npm package hosted a different utility (0.4.1 being the latest version of that codebase), and this advisory does not apply to those versions. We recommend upgrading to the latest version of Next.js to improve the overall security of your application. ### Patches https://github.com/vercel/next.js/releases/tag/v11.1.0

Affected Packages

npm next
ECOSYSTEM: ≥0.9.9 <11.1.0

CVSS Scoring

CVSS Score

5.0

CVSS Vector

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

Advisory provided by GitHub Security Advisory Database. Published: August 12, 2021, Modified: April 28, 2022

References

Published: 2021-08-11T23:15:10
Last Modified: 2024-08-04T01:23:01.488Z
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