CVE-2021-23439

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

0.89% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 59.0% of scored records. A rank, not a probability.

NVD base score

6.1 (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: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

2021-09-05 14:10Z5 YR AGO

Last updated

2024-09-16 18:56Z2 YR AGO

Reserved

2021-01-08

Assigning CNA

snyk

Record state

PUBLISHED

Severity

Medium (CVSS 4.2)

CNA CVSS vector

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

Weaknesses

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

Data version

5.1

Document digest

4e85a81f1c4baddd1362be887d02c9166a428bde8cf6a9c296afa8f042d04a5b

• snyk.iohttps://snyk.io/vuln/SNYK-JS-FILEUPLOADWITHPREVIEW-1579492x_refsource_MISC
• github.comhttps://github.com/johndatserakis/file-upload-with-preview/blob/develop/src/file-upload-with-preview.js%23L168x_refsource_MISC
• github.comhttps://github.com/johndatserakis/file-upload-with-preview/pull/40/files?file-filters%5B%5D=.js&hide-deleted-files=true%23diff-fe47b243de17419c0daa22cd785cd754baed60cf3679d3da1d6fe006f9f4a7f0R174x_refsource_MISC