CVE-2021-4279

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

1.15% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 66.8% 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

2022-12-25 19:41Z3 YR AGO

Last updated

2024-08-03 17:23Z2 YR AGO

Reserved

2022-12-25

Assigning CNA

VulDB

Record state

PUBLISHED

Severity

Medium (CVSS 6.3)

CNA CVSS vector

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

Weaknesses

• CWE-1321Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')Variant

Data version

5.1

Document digest

ad3350f39b250d3297f26b92abb6e2fcae7837fbdf08aa935360eeb20845437a

• vuldb.comhttps://vuldb.com/?id.216778vdb-entry
• vuldb.comhttps://vuldb.com/?ctiid.216778signaturepermissions-required
• github.comhttps://github.com/Starcounter-Jack/JSON-Patch/pull/262exploitissue-trackingpatch
• github.comhttps://github.com/Starcounter-Jack/JSON-Patch/commit/7ad6af41eabb2d799f698740a91284d762c955c9patch
• github.comhttps://github.com/Starcounter-Jack/JSON-Patch/releases/tag/3.1.1patch