CVE-2021-43856

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

0.91% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 60.1% 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

2021-12-27 18:05Z4 YR AGO

Last updated

2024-08-04 04:10Z2 YR AGO

Reserved

2021-11-16

Assigning CNA

GitHub_M

Record state

PUBLISHED

Severity

High (CVSS 8.2)

CNA CVSS vector

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

Weaknesses

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

Data version

5.1

Document digest

0d5162d3ad38ccb467fe84d649bdc6ffc5895d7c7a812271d18071f4ac3b3ded

• github.comhttps://github.com/Requarks/wiki/security/advisories/GHSA-rhpf-929m-7fm2x_refsource_CONFIRM
• github.comhttps://github.com/Requarks/wiki/commit/79bdd4409316adf649806de3e22352297f85cee0x_refsource_MISC
• github.comhttps://github.com/Requarks/wiki/releases/tag/2.5.264x_refsource_MISC