CVE-2021-39177

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

1.44% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 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

2021-08-30 23:00Z5 YR AGO

Last updated

2024-08-04 01:58Z2 YR AGO

Reserved

2021-08-16

Assigning CNA

GitHub_M

Record state

PUBLISHED

Severity

High (CVSS 7.4)

CNA CVSS vector

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

Weaknesses

• CWE-287Improper AuthenticationClass

Data version

5.1

Document digest

16491f784b28b60931a739537dbc70fdbc4b80d462d6ceb2559ff77bf37b7dd0

• github.comhttps://github.com/GeyserMC/Geyser/security/advisories/GHSA-h77f-xxx7-4858x_refsource_CONFIRM
• github.comhttps://github.com/GeyserMC/Geyser/commit/b9541505af68ac7b7c093206ac7b1ba88957a5a6x_refsource_MISC
• updates.playhive.comhttps://updates.playhive.com/weekend-maintenance-disclosure-2kJMaYx_refsource_MISC