CVE-2022-21650

Convos is an open source multi-user chat that runs in a web browser. You can’t use SVG extension in Convos’ chat window, but you can upload a file with an .html extension. By uploading an SVG file with an html extension the upload filter can be bypassed. This causes Stored XSS. Also, after uploading a file the XSS attack is triggered upon a user viewing the file. Through this vulnerability, an attacker is capable to execute malicious scripts. Users are advised to update as soon as possible.

Date published : 2022-01-04

https://github.com/convos-chat/convos/security/advisories/GHSA-mm2v-4v7g-m695

https://blog.pocas.kr/2021/12/30/2021-12-30-s-xss-convos-chat/#First-vulnerability