CVE-2021-26271
MEDIUMCKEditor 4 < 4.16 - Regular Expression Denial of Service via Styles Input Dialog
Title source: llmDescription
It was possible to execute a ReDoS-type attack inside CKEditor 4 before 4.16 by persuading a victim to paste crafted text into the Styles input of specific dialogs (in the Advanced Tab for Dialogs plugin).
References (4)
Core 4
Core References
Release Notes, Third Party Advisory x_refsource_misc
https://github.com/ckeditor/ckeditor4/blob/major/CHANGES.md#ckeditor-416
Patch, Third Party Advisory x_refsource_misc
https://www.oracle.com//security-alerts/cpujul2021.html
Vendor Advisory x_refsource_confirm
https://ckeditor.com/blog/CKEditor-4.16-with-improved-image-pasting-High-Contrast-support-and-a-new-color-API/#security-comes-first
Patch, Third Party Advisory x_refsource_misc
https://www.oracle.com/security-alerts/cpuoct2021.html
Scores
CVSS v3
6.5
EPSS
0.0196
EPSS Percentile
77.7%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Details
CWE
CWE-829
Status
published
Products (12)
ckeditor/ckeditor
4.0 - 4.16
npm/ckeditor4-dev
0 - 4.16npm
oracle/agile_plm
9.3.5
oracle/agile_plm
9.3.6
oracle/application_express
< 21.1.0
oracle/financial_services_analytical_applications_infrastructure
8.1.0
oracle/financial_services_analytical_applications_infrastructure
8.1.1
oracle/financial_services_analytical_applications_infrastructure
8.0.6 - 8.0.9
oracle/jd_edwards_enterpriseone_tools
< 9.2.6.0
oracle/siebel_ui_framework
< 21.9
... and 2 more
Published
Jan 26, 2021
Tracked Since
Feb 18, 2026