CVE-2021-39609

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

1.70% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 75.2% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

2021-08-23 20:28Z5 YR AGO

Last updated

2024-08-04 02:13Z2 YR AGO

Reserved

2021-08-23

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')Base

Data version

5.1

Document digest

e67416ca1b0806c810cbb8c45f6eaed201112ff8da5a82d3b553a67f4bfc97a9

• github.comhttps://github.com/flatCore/flatCore-CMS/issues/53x_refsource_MISC
• github.comhttps://github.com/nu11secur1ty/CVE-mitre/tree/main/CVE-2021-39609x_refsource_MISC
• www.nu11secur1ty.comhttps://www.nu11secur1ty.com/2021/08/cve-2021-39609.htmlx_refsource_MISC