CVE-2021-438037.5HighCWE-20

CVE-2021-43803: Unexpected server crash in Next.js

vercel · next.js

Affected: vercel next.js · Exploitation: likely to be exploited (10% or more)

Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.

47.3%probability of exploitation in the next 30 days

98th percentile

050100

Higher than 98% of scored CVEs

7.5HighCVSS 3.1

LowMediumHighCrit.

DescriptionCVE.org

Next.js is a React framework. In versions of Next.js prior to 12.0.5 or 11.1.3, invalid or malformed URLs could lead to a server crash. In order to be affected by this issue, the deployment must use Next.js versions above 11.1.0 and below 12.0.5, Node.js above 15.0.0, and next start or a custom server. Deployments on Vercel are not affected, along with similar environments where invalid requests are filtered before reaching Next.js. Versions 12.0.5 and 11.1.3 contain patches for this issue.

Affected products1

From the CVE record. A product or version that is not listed is unknown, not unaffected.

vercel · next.js>= 11.1.0, < 11.1.3; >= 12.0.0, < 12.0.5

On the Atlas

Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.

Open the Atlas

Exploitation: Likely to be exploited (10% or more). EPSS gives it a 10% or higher chance of exploitation in the next 30 days.
CISA KEV: Not listed
Public check: No public nuclei template
Weakness: Improper Input Validation · Input Validation and Logic
Vendor: vercel
Published: December 2021
Band: Likely to be exploited (10% or more), December 2021

CoverageNo articles yet

No CyberSIXT article names CVE-2021-43803 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.