CVE-2021-37843

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

1.54% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 73.1% of scored records. A rank, not a probability.

NVD base score

9.8 (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:H/I:H/A:H

NVD analysis status

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

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

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

2021-08-02 18:47Z5 YR AGO

Last updated

2024-08-04 01:30Z2 YR AGO

Reserved

2021-08-02

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Critical (CVSS 9.8)

CNA CVSS vector

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

Weaknesses

• CWE-306Missing Authentication for Critical FunctionBase

Data version

5.1

Document digest

21281bf4cda2bf8b49ca507bf8e546c4efac47757d75468d2d177d79f1423c88

• wiki.resolution.dehttps://wiki.resolution.de/doc/saml-sso/5.0.x/all/security-advisories/2021-07-29-authentication-bypass-network-attacker-can-login-to-users-accounts-when-usernames-are-knownx_refsource_MISC