ckeditor/ckeditor4 · Security
CKEditor 4 ReDoS Vulnerability
- GHSA ID
- GHSA-jv4c-7jqq-m34x
- CVE ID
- CVE-2021-26271
- Severity
- medium
- Published
- Updated
- CVSS
- 6.5 · CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- CVSS v3
- 6.5 · CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Description
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).
CWEs
- CWE-1333 · Inefficient Regular Expression Complexity
References
- https://nvd.nist.gov/vuln/detail/CVE-2021-26271 ↗
- https://github.com/ckeditor/ckeditor4/blob/major/CHANGES.md#ckeditor-416 ↗
- https://www.oracle.com//security-alerts/cpujul2021.html ↗
- https://www.oracle.com/security-alerts/cpuoct2021.html ↗
- https://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 ↗
- https://github.com/advisories/GHSA-jv4c-7jqq-m34x ↗