cve/2020/CVE-2020-7680.md

### [CVE-2020-7680](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-7680)
![](https://img.shields.io/static/v1?label=Product&message=docsify&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=Cross-site%20Scripting%20(XSS)&color=brighgreen)

### Description

docsify prior to 4.11.4 is susceptible to Cross-site Scripting (XSS). Docsify.js uses fragment identifiers (parameters after # sign) to load resources from server-side .md files. Due to lack of validation here, it is possible to provide external URLs after the /#/ (domain.com/#//attacker.com) and render arbitrary JavaScript/HTML inside docsify page.

### POC

#### Reference
- http://packetstormsecurity.com/files/158515/Docsify.js-4.11.4-Cross-Site-Scripting.html
- http://packetstormsecurity.com/files/158515/Docsify.js-4.11.4-Cross-Site-Scripting.html
- http://packetstormsecurity.com/files/161495/docsify-4.11.6-Cross-Site-Scripting.html
- http://packetstormsecurity.com/files/161495/docsify-4.11.6-Cross-Site-Scripting.html
- https://github.com/docsifyjs/docsify/issues/1126
- https://github.com/docsifyjs/docsify/issues/1126
- https://snyk.io/vuln/SNYK-JS-DOCSIFY-567099
- https://snyk.io/vuln/SNYK-JS-DOCSIFY-567099

#### Github
- https://github.com/ARPSyndicate/cvemon