CVE-2021-3803

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

2.20% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 82.3% of scored records. A rank, not a probability.

NVD base score

7.5 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2021-09-17 00:00Z5 YR AGO

Last updated

2024-08-03 17:09Z2 YR AGO

Reserved

2021-09-15

Assigning CNA

@huntrdev

Record state

PUBLISHED

Severity

High (CVSS 7.5)

CNA CVSS vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weaknesses

• CWE-1333Inefficient Regular Expression ComplexityBase
• CWE-400Uncontrolled Resource ConsumptionClass

Data version

5.1

Document digest

4fc1fc666a4fc8823c1711af763cc94aed0c68c108eb58dc28afdee2b9174cac

• huntr.devhttps://huntr.dev/bounties/8cf8cc06-d2cf-4b4e-b42c-99fafb0b04d0
• github.comhttps://github.com/fb55/nth-check/commit/9894c1d2010870c351f66c6f6efcf656e26bb726
• lists.debian.org[debian-lts-announce] 20230522 [SECURITY] [DLA 3428-1] node-nth-check security updatehttps://lists.debian.org/debian-lts-announce/2023/05/msg00023.htmlmailing-list