CVE-2022-21650 Information

Description

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.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Reference

https://github.com/convos-chat/convos/security/advisories/GHSA-mm2v-4v7g-m695 https://github.com/convos-chat/convos/commit/5c0a1ec9a2c147bc3b63fd5a48da5f32e18fe5df https://blog.pocas.kr/2021/12/30/2021-12-30-s-xss-convos-chat/#First-vulnerability https://www.huntr.dev/bounties/ae424798-de01-4972-b73b-2db674f82368/

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

REQUIRED

Confidentiality Impact

CHANGED

Integrity Impact

LOW

Availability Impact

LOW

Base Score

NONE

Base Severity

5.4