ReDoS Vulnerability in CKEditor 4 by CKSource
CVE-2021-26271

6.5MEDIUM

Key Information:

Vendor

Ckeditor

Status
Ckeditor
Vendor
CVE Published:
26 January 2021

What is CVE-2021-26271?

A vulnerability exists in CKEditor 4 prior to version 4.16 that allows attackers to execute a ReDoS-type attack. This can be achieved by convincing users to paste specifically crafted text into the Styles input field of selected dialogs within the Advanced Tab for the Dialogs plugin. Exploiting this vulnerability can lead to significant denial of service, impacting the usability of the affected application.

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References

https://github.com/ckeditor/ckeditor4/blob/major/CHANGES....
x_refsource_MISC
https://www.oracle.com//security-alerts/cpujul2021.html
x_refsource_MISC
https://ckeditor.com/blog/CKEditor-4.16-with-improved-ima...
x_refsource_CONFIRM

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

JSON
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