CVE-2021-26271
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2021-26271
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-26271.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2021-26271
- Aliases
- Downstream
- Published
- 2021-01-26T21:15:12.860Z
- Modified
- 2025-11-17T04:11:47.804226Z
- Severity
-
- 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- [none]
- Details
-
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
-
- 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/ckeditor/ckeditor4/blob/major/CHANGES.md#ckeditor-416
- https://www.oracle.com//security-alerts/cpujul2021.html
- https://www.oracle.com/security-alerts/cpuoct2021.html
Affected packages
Git / github.com/ckeditor/ckeditor-releases
Affected versions
4.*
4.0.1/standard
4.0/standard
4.1.1/standard
4.1.2/standard
4.1.3/standard
4.1/standard
4.1rc/standard
4.2.1/standard
4.2.2/standard
4.2.3/standard
4.2/standard
4.3.0/standard
4.3.1/standard
4.3.2/standard
standard/4.*
standard/4.10.0
standard/4.10.1
standard/4.11.0
standard/4.11.1
standard/4.11.2
standard/4.11.3
standard/4.11.4
standard/4.12.0
standard/4.12.1
standard/4.13.0
standard/4.13.1
standard/4.14.0
standard/4.14.1
standard/4.15.0
standard/4.15.1
standard/4.3.3
standard/4.3.4
standard/4.3.5
standard/4.4.0
standard/4.4.1
standard/4.4.2
standard/4.4.3
standard/4.4.4
standard/4.4.5
standard/4.4.6
standard/4.4.7
standard/4.4.8
standard/4.5.0
standard/4.5.1
standard/4.5.10
standard/4.5.11
standard/4.5.2
standard/4.5.3
standard/4.5.4
standard/4.5.5
standard/4.5.6
standard/4.5.7
standard/4.5.8
standard/4.5.9
standard/4.6.0
standard/4.6.1
standard/4.6.2
standard/4.7.0
standard/4.7.1
standard/4.7.2
standard/4.7.3
standard/4.8.0
standard/4.9.0
standard/4.9.1
standard/4.9.2
Git / github.com/ckeditor/ckeditor4
Affected versions
4.*
4.0
4.0.0
4.0.1
4.0.1.1
4.0.2
4.0.3
4.1
4.1.0
4.1.1
4.1.2
4.1.3
4.10.0
4.10.1
4.11.0
4.11.1
4.11.2
4.11.3
4.11.4
4.12.0
4.12.1
4.13.0
4.13.1
4.14.0
4.14.1
4.15.0
4.15.1
4.1rc
4.2
4.2.0
4.2.1
4.2.2
4.2.3
4.3.0
4.3.1
4.3.2
4.3.3
4.3.4
4.3.5
4.3beta
4.4.0
4.4.1
4.4.2
4.4.3
4.4.4
4.4.5
4.4.6
4.4.7
4.4.8
4.5.0
4.5.0-beta
4.5.1
4.5.10
4.5.11
4.5.2
4.5.3
4.5.4
4.5.5
4.5.6
4.5.7
4.5.8
4.5.9
4.6.0
4.6.1
4.6.2
4.7.0
4.7.1
4.7.2
4.7.3
4.8.0
4.9.0
4.9.1
4.9.2