CVE-2021-31406

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

0.21% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 11.2% of scored records. A rank, not a probability.

NVD base score

2.5 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

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

2021-04-23 16:05Z5 YR AGO

Last updated

2024-09-17 00:02Z2 YR AGO

Reserved

2021-04-15

Assigning CNA

Vaadin

Record state

PUBLISHED

Severity

Medium (CVSS 4.0)

CNA CVSS vector

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

Weaknesses

• CWE-208Observable Timing DiscrepancyBase
• CWE-203Observable DiscrepancyBase

Data version

5.1

Document digest

a75483f37df79aa1999d2c8293e50090ac45172c13ebcb9c72ea583614aa7b72

• vaadin.comhttps://vaadin.com/security/cve-2021-31406x_refsource_MISC
• github.comhttps://github.com/vaadin/flow/pull/10157x_refsource_MISC