CVE-2021-21391
CVSS V2 Medium 4.3
CVSS V3 Medium 6.5
Description
CKEditor 5 provides a WYSIWYG editing solution. This CVE affects the following npm packages: ckeditor5-engine, ckeditor5-font, ckeditor5-image, ckeditor5-list, ckeditor5-markdown-gfm, ckeditor5-media-embed, ckeditor5-paste-from-office, and ckeditor5-widget. Following an internal audit, a regular expression denial of service (ReDoS) vulnerability has been discovered in multiple CKEditor 5 packages. The vulnerability allowed to abuse particular regular expressions, which could cause a significant performance drop resulting in a browser tab freeze. It affects all users using the CKEditor 5 packages listed above at version <= 26.0.0. The problem has been recognized and patched. The fix will be available in version 27.0.0.
Overview
- CVE ID
- CVE-2021-21391
- Assigner
- security-advisories@github.com
- Vulnerability Status
- Analyzed
- Published Version
- 2021-04-29T01:15:07
- Last Modified Date
- 2021-05-10T18:22:19
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| cpe:2.3:a:ckeditor:ckeditor5-engine:*:*:*:*:*:node.js:*:* | 1 | OR | 27.0.0 | |
| cpe:2.3:a:ckeditor:ckeditor5-font:*:*:*:*:*:node.js:*:* | 1 | OR | 27.0.0 | |
| cpe:2.3:a:ckeditor:ckeditor5-image:*:*:*:*:*:node.js:*:* | 1 | OR | 27.0.0 | |
| cpe:2.3:a:ckeditor:ckeditor5-list:*:*:*:*:*:node.js:*:* | 1 | OR | 27.0.0 | |
| cpe:2.3:a:ckeditor:ckeditor5-markdown-gfm:*:*:*:*:*:node.js:*:* | 1 | OR | 27.0.0 | |
| cpe:2.3:a:ckeditor:ckeditor5-media-embed:*:*:*:*:*:node.js:*:* | 1 | OR | 27.0.0 | |
| cpe:2.3:a:ckeditor:ckeditor5-paste-from-office:*:*:*:*:*:node.js:*:* | 1 | OR | 27.0.0 | |
| cpe:2.3:a:ckeditor:ckeditor5-widget:*:*:*:*:*:node.js:*:* | 1 | OR | 27.0.0 |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:N/AC:M/Au:N/C:N/I:N/A:P
- Access Vector
- NETWORK
- Access Compatibility
- MEDIUM
- Authentication
- NONE
- Confidentiality Impact
- NONE
- Integrity Impact
- NONE
- Availability Impact
- PARTIAL
- Base Score
- 4.3
- Severity
- MEDIUM
- Exploitability Score
- 8.6
- Impact Score
- 2.9
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- Attack Vector
- NETWORK
- Attack Compatibility
- LOW
- Privileges Required
- NONE
- User Interaction
- REQUIRED
- Scope
- UNCHANGED
- Confidentiality Impact
- NONE
- Availability Impact
- HIGH
- Base Score
- 6.5
- Base Severity
- MEDIUM
- Exploitability Score
- 2.8
- Impact Score
- 3.6
References
| Reference URL | Reference Tags |
|---|---|
| https://www.npmjs.com/package/@ckeditor/ckeditor5-markdown-gfm | Product Third Party Advisory |
| https://www.npmjs.com/package/@ckeditor/ckeditor5-engine | Product Third Party Advisory |
| https://www.npmjs.com/package/@ckeditor/ckeditor5-image | Product Third Party Advisory |
| https://www.npmjs.com/package/@ckeditor/ckeditor5-media-embed | Product Third Party Advisory |
| https://github.com/ckeditor/ckeditor5/security/advisories/GHSA-3rh3-wfr4-76mj | Third Party Advisory |
| https://www.npmjs.com/package/@ckeditor/ckeditor5-list | Product Third Party Advisory |
| https://www.npmjs.com/package/@ckeditor/ckeditor5-font | Product Third Party Advisory |
| https://www.npmjs.com/package/@ckeditor/ckeditor5-paste-from-office | Product Third Party Advisory |
| https://www.npmjs.com/package/@ckeditor/ckeditor5-widget | Product Third Party Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2021-21391 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21391 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 16:16:32 | Added to TrackCVE | |||
| 2022-12-05 01:13:20 | 2021-04-29T01:15Z | 2021-04-29T01:15:07 | CVE Published Date | updated |
| 2022-12-05 01:13:20 | 2021-05-10T18:22:19 | CVE Modified Date | updated | |
| 2022-12-05 01:13:20 | Analyzed | Vulnerability Status | updated |