CVE-2022-21649

Name: CVE-2022-21649
Creator: NVD / NIST
Published: 2022-01-04T21:15:07.883+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 0.93%

Last modified Jun 17, 2026

CVE-2022-21649 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. 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. EPSS estimates a 0.93% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

5.4/10

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

EPSS Probability

0.93%

56.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Convos	Convos	< 6.52

References

https://blog.pocas.kr/2021/12/30/2021-12-30-s-xss-convos-chat/#Second-vulnerabilityBroken Link, Third Party Advisory
https://github.com/convos-chat/convos/commit/86b2193de375005ba71d9dd53843562c6ac1847cPatch, Third Party Advisory
https://github.com/convos-chat/convos/security/advisories/GHSA-xmpj-xwm3-vww7Patch, Third Party Advisory
https://www.huntr.dev/bounties/4532a0ac-4e7c-4fcf-9fe3-630e132325c0/Exploit, Patch, Third Party Advisory
https://blog.pocas.kr/2021/12/30/2021-12-30-s-xss-convos-chat/#Second-vulnerabilityBroken Link, Third Party Advisory
https://github.com/convos-chat/convos/commit/86b2193de375005ba71d9dd53843562c6ac1847cPatch, Third Party Advisory
https://github.com/convos-chat/convos/security/advisories/GHSA-xmpj-xwm3-vww7Patch, Third Party Advisory
https://www.huntr.dev/bounties/4532a0ac-4e7c-4fcf-9fe3-630e132325c0/Exploit, Patch, Third Party Advisory

Timeline

Published: Jan 4, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-21649?

How severe is CVE-2022-21649?

CVE-2022-21649 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.93% probability of exploitation in the next 30 days.

How do I fix CVE-2022-21649?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-21649?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST