CVE-2021-29484

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

7.94% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 94.2% of scored records. A rank, not a probability.

NVD base score

6.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

2021-04-29 20:35Z5 YR AGO

Last updated

2024-08-03 22:11Z2 YR AGO

Reserved

2021-03-30

Assigning CNA

GitHub_M

Record state

PUBLISHED

Severity

Medium (CVSS 6.8)

CNA CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/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

519f05e7a38e1b4482937306ad7f8726aa4e0dad589145380ebfedd0cb3a7ed1

• github.comhttps://github.com/TryGhost/Ghost/security/advisories/GHSA-9fgx-q25h-jxrgx_refsource_CONFIRM
• forum.ghost.orghttps://forum.ghost.org/t/critical-security-update-available-for-ghost-4-x/22290x_refsource_MISC
• www.npmjs.comhttps://www.npmjs.com/package/ghostx_refsource_MISC
• blog.sonarsource.comhttps://blog.sonarsource.com/ghost-admin-takeoverx_refsource_CONFIRM