CVE-2022-21650

Public Exploit
Stored XSS via html file upload in convos

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.

Category

7.6
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.35%
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/#First-vulnerability broken link
https://github.com/convos-chat/convos/commit/5c0a1ec9a2c147bc3b63fd5a48da5f32e18fe5df third party advisory patch
https://www.huntr.dev/bounties/ae424798-de01-4972-b73b-2db674f82368/ patch exploit third party advisory issue tracking
https://github.com/convos-chat/convos/security/advisories/GHSA-mm2v-4v7g-m695 third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2022-21650?
CVE-2022-21650 has been scored as a high severity vulnerability.
How to fix CVE-2022-21650?
To fix CVE-2022-21650, 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-2022-21650 being actively exploited in the wild?
It is possible that CVE-2022-21650 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-2022-21650?
CVE-2022-21650 affects convos-chat convos.
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