CVE-2021-4124

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

0.96% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 61.2% 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

2021-12-16 13:15Z4 YR AGO

Last updated

2024-08-03 17:16Z2 YR AGO

Reserved

2021-12-15

Assigning CNA

@huntrdev

Record state

PUBLISHED

Severity

High (CVSS 8.1)

CNA CVSS vector

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

Weaknesses

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

Data version

5.1

Document digest

1411397e805501886863c5f102af9b7a16f762023fa62d343a12a14b1fdb02e6

• huntr.devhttps://huntr.dev/bounties/a6ca142e-60aa-4d6f-b231-5d1bcd1b7190x_refsource_CONFIRM
• github.comhttps://github.com/meetecho/janus-gateway/commit/f62bba6513ec840761f2434b93168106c7c65a3dx_refsource_MISC