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CVE-2021-23342
CVE information
Published
Last Modified
CVSSv2.0 Severity
CVSSv3.1 Severity
Impact Analysis
Description
This affects the package docsify before 4.12.0. It is possible to bypass the remediation done by CVE-2020-7680 and execute malicious JavaScript through the following methods 1) When parsing HTML from remote URLs, the HTML code on the main page is sanitized, but this sanitization is not taking place in the sidebar. 2) The isURL external check can be bypassed by inserting more “////” characters.
CVSSv2.0 Score
- Severity
- Medium
- Base Score
- 4.3/10
- Exploit Score
- 8.6/10
- Access Vector
- Network
- Access Complexity
- Medium
- Authentication Required
- None
- Impact Score
- 2.9/10
- Confidentiality Impact
- None
- Availability Impact
- None
- Integrity Impact
- Partial
CVSSv3.1 Score
- Severity
- Medium
- Base Score
- 6.1/10
- Exploit Score
- 2.8/10
- Access Vector
- Network
- Access Complexity
- Low
- Privileges Required
- None
- Impact Score
- 2.7/10
- Confidentiality Impact
- Low
- Availability Impact
- None
- Integrity Impact
- Low
- Scope
- Changed
- User Interaction
- Required
Products Affected
| CPE | Affected | Vulnerable | Excluding | Edit |
|---|---|---|---|---|
| cpe:2.3:a:docsifyjs:docsify:*:*:*:*:*:*:*:* |
Yes
|
- | 4.12.0 |
References
- https://snyk.io/vuln/SNYK-JS-DOCSIFY-1066017
- https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1076593
- https://github.com/docsifyjs/docsify/commit/ff2a66f12752471277fe81a64ad6c4b2c08111fe
- http://seclists.org/fulldisclosure/2021/Feb/71
- http://packetstormsecurity.com/files/161495/docsify-4.11.6-Cross-Site-Scripting.html