CVE-2022-21649

Public Exploit
Stored XSS via attribute in convos

Description

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.

Category

7.6
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.35%
Third-Party Advisory pocas.kr Third-Party Advisory github.com Third-Party Advisory github.com Third-Party Advisory huntr.dev
Affected: convos-chat convos
Published at:
Updated at:

References

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

Frequently Asked Questions

What is the severity of CVE-2022-21649?
CVE-2022-21649 has been scored as a high severity vulnerability.
How to fix CVE-2022-21649?
To fix CVE-2022-21649, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2022-21649 being actively exploited in the wild?
It is possible that CVE-2022-21649 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2022-21649?
CVE-2022-21649 affects convos-chat convos.
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