GitHub Advisory DatabaseGHSA-JV4C-7JQQ-M34XCKEditor 4 ReDoS Vulnerability
4.3 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:N/I:N/A:P
6.5 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
6.7 Medium
AI Score
Confidence
High
0.001 Low
EPSS
Percentile
51.0%
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).
Affected configurations
| CPE | Name | Operator | Version |
|---|---|---|---|
| ckeditor4-dev | lt | 4.16 |
References
github.com/advisories/GHSA-jv4c-7jqq-m34x
github.com/ckeditor/ckeditor4/blob/major/CHANGES.md#ckeditor-416
nvd.nist.gov/vuln/detail/CVE-2021-26271
web.archive.org/web/20210128132707/https://ckeditor.com/blog/CKEditor-4.16-with-improved-image-pasting-High-Contrast-support-and-a-new-color-API/#security-comes-first
www.oracle.com//security-alerts/cpujul2021.html
www.oracle.com/security-alerts/cpuoct2021.html
Related
4.3 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:N/I:N/A:P
6.5 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
6.7 Medium
AI Score
Confidence
High
0.001 Low
EPSS
Percentile
51.0%