CVE-2021-31558

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

10.56% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 95.3% 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

2021-12-22 18:06Z4 YR AGO

Last updated

2024-09-16 18:40Z2 YR AGO

Reserved

2021-12-14

Assigning CNA

icscert

Record state

PUBLISHED

Severity

Medium (CVSS 6.5)

CNA CVSS vector

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

Weaknesses

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

Data version

5.1

Document digest

ddafc0cb2b7c79301d57c76e93b727f863555f2cf01e2ae5b20397d24dfe7a62

• www.cisa.govhttps://www.cisa.gov/uscert/ics/advisories/icsa-21-238-03x_refsource_MISC