CVE-2021-33829

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

3.18% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 87.9% 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

2021-06-09 11:51Z5 YR AGO

Last updated

2024-08-03 23:58Z2 YR AGO

Reserved

2021-06-03

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

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

Data version

5.1

Document digest

516cdc566778c0939f73cf9b1d990f8c3a6580c5830751c79e4003b6b36ecf27

• www.drupal.orghttps://www.drupal.org/sa-core-2021-003x_refsource_CONFIRM
• ckeditor.comhttps://ckeditor.com/blog/ckeditor-4.16.1-with-accessibility-enhancements/#improvements-for-comments-in-html-parserx_refsource_MISC
• lists.fedoraproject.orgFEDORA-2021-51457da891https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NYA354LJP47KCVJMTUO77ZCX3ZK42G3T/vendor-advisoryx_refsource_FEDORA
• lists.fedoraproject.orgFEDORA-2021-72176a63a8https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UVOYN2WKDPLKCNILIGEZM236ABQASLGW/vendor-advisoryx_refsource_FEDORA
• lists.fedoraproject.orgFEDORA-2021-87578dca12https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WAGNWHFIQAVCP537KFFS2A2GDG66J7XD/vendor-advisoryx_refsource_FEDORA
• lists.debian.org[debian-lts-announce] 20211109 [SECURITY] [DLA 2813-1] ckeditor security updatehttps://lists.debian.org/debian-lts-announce/2021/11/msg00007.htmlmailing-listx_refsource_MLIST