CVE-2021-3666

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

1.29% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 69.9% 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

2021-09-13 17:56Z5 YR AGO

Last updated

2024-08-03 17:01Z2 YR AGO

Reserved

2021-07-26

Assigning CNA

@huntrdev

Record state

PUBLISHED

Severity

High (CVSS 7.6)

CNA CVSS vector

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

Weaknesses

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

Data version

5.1

Document digest

8f8ebfa70ab541cd685c1c737b7efc9a140d238904e4e80d03df53d7225c540d

• huntr.devhttps://huntr.dev/bounties/1-other-fiznool/body-parser-xmlx_refsource_CONFIRM
• github.comhttps://github.com/fiznool/body-parser-xml/commit/d46ca622560f7c9a033cd9321c61e92558150d63x_refsource_MISC