CVE-2021-39199

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

1.07% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 64.7% 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

2021-09-07 18:50Z5 YR AGO

Last updated

2024-08-04 01:58Z2 YR AGO

Reserved

2021-08-16

Assigning CNA

GitHub_M

Record state

PUBLISHED

Severity

Critical (CVSS 10.0)

CNA CVSS vector

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

Weaknesses

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

Data version

5.1

Document digest

a3fb57fb6bde29ba53207e4dcf543346a95dcec033cd4e7ba59c21368986d574

• github.comhttps://github.com/remarkjs/remark-html/security/advisories/GHSA-9q5w-79cv-947mx_refsource_CONFIRM
• github.comhttps://github.com/remarkjs/remark-html/commit/b75c9dde582ad87ba498e369c033dc8a350478c1x_refsource_MISC
• github.comhttps://github.com/remarkjs/remark-html/releases/tag/14.0.1x_refsource_MISC
• www.npmjs.comhttps://www.npmjs.com/package/remark-htmlx_refsource_MISC