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01 Record

CVE-2021-21425

Unauthenticated Arbitrary YAML Write/Update leads to Code Execution

CriticalPUBLISHEDCNA: GitHub_M
CNA base score9.3 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:N
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02 Description

Unauthenticated Arbitrary YAML Write/Update leads to Code Execution

03 Exploitation and scoring

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
80.60% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 99.5% 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.

04 Metadata

Published
2021-04-07 18:20Z5 YR AGO
Last updated
2024-08-03 18:09Z2 YR AGO
Reserved
2020-12-22
Assigning CNA
GitHub_M
Record state
PUBLISHED
Severity
Critical (CVSS 9.3)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:N
Weaknesses
  • CWE-284Improper Access ControlPillar
Data version
5.1
Document digest
1a7ef46fb681fb3860e2b3decf1b4d857b465678a9b441442d73830d41281880

05 Affected products

VendorProductVersionsPlatforms
getgravgrav-plugin-admin<= 1.10.7—

06 References