CVE-2022-21649

Convos is an open source multi-user chat that runs in a web browser. Characters starting with "https://" in the chat window create an <a> tag. Stored XSS vulnerability using onfocus and autofocus occurs because escaping exists for "<" or ">" but escaping for double quotes does not exist. Through this vulnerability, an attacker is capable to execute malicious scripts. Users are advised to update as soon as possible.

Score

CVSS 3.1 7.6 High

Status

Modified - security-advisories@github.com

Published

2022-01-04

Last modified

2025-04-22

Weaknesses

CWE-79

Affected products

• Convos (Convos)
• Convos (Convos-chat)

References

• https://blog.pocas.kr/2021/12/30/2021-12-30-s-xss-convos-chat/#Second-vulnerability
• https://github.com/convos-chat/convos/commit/86b2193de375005ba71d9dd53843562c6ac1847c
• https://github.com/convos-chat/convos/security/advisories/GHSA-xmpj-xwm3-vww7
• https://www.huntr.dev/bounties/4532a0ac-4e7c-4fcf-9fe3-630e132325c0/