ReDoS Vulnerability in CKEditor 4 by CKSource
CVE-2021-26272

6.5MEDIUM

Key Information:

Vendor

Ckeditor

Status
Ckeditor
Vendor
CVE Published:
26 January 2021

What is CVE-2021-26272?

CKEditor 4 versions before 4.16 are susceptible to a ReDoS-type attack. This vulnerability arises when a malicious user convinces a victim to paste specially crafted URL-like text into the CKEditor. Once this text is inputted, pressing Enter or Space may lead to significant performance degradation, thereby obstructing the editor's functionality. It is essential to implement updates or patches to safeguard applications leveraging CKEditor against these types of attacks.

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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_MISC

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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