CVE-2021-3734

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

0.40% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 34.5% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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

2021-08-26 12:48Z5 YR AGO

Last updated

2024-08-03 17:01Z2 YR AGO

Reserved

2021-08-24

Assigning CNA

@huntrdev

Record state

PUBLISHED

Severity

Medium (CVSS 6.5)

CNA CVSS vector

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

Weaknesses

• CWE-1021Improper Restriction of Rendered UI Layers or FramesBase
• CWE-352Cross-Site Request Forgery (CSRF)Compound

Data version

5.1

Document digest

532657a720af2dc63687b653505993bd934d6e648a55dbfb416d42ab8900f0ad

• huntr.devhttps://huntr.dev/bounties/dd2e2dbe-efe5-49ec-be11-7a7e7c41debdx_refsource_CONFIRM
• github.comhttps://github.com/yourls/yourls/commit/0a70acdcfb5fcbc63dbc5750018d608288eba3fex_refsource_MISC