CVE-2022-21649 — HIGH (7.6)

Vulnerability 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.

CVSS Score

7.6

HIGH

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality

HIGH

Integrity

LOW

Availability

NONE

Affected Products

Vendor	Product	Versions
Convos	Convos	< 6.52

Related Weaknesses (CWE)

CWE-79

References

https://blog.pocas.kr/2021/12/30/2021-12-30-s-xss-convos-chat/#Second-vulnerabilBroken LinkThird Party Advisory
https://github.com/convos-chat/convos/commit/86b2193de375005ba71d9dd53843562c6acPatchThird Party Advisory
https://github.com/convos-chat/convos/security/advisories/GHSA-xmpj-xwm3-vww7PatchThird Party Advisory
https://www.huntr.dev/bounties/4532a0ac-4e7c-4fcf-9fe3-630e132325c0/ExploitPatchThird Party Advisory
https://blog.pocas.kr/2021/12/30/2021-12-30-s-xss-convos-chat/#Second-vulnerabilBroken LinkThird Party Advisory
https://github.com/convos-chat/convos/commit/86b2193de375005ba71d9dd53843562c6acPatchThird Party Advisory
https://github.com/convos-chat/convos/security/advisories/GHSA-xmpj-xwm3-vww7PatchThird Party Advisory
https://www.huntr.dev/bounties/4532a0ac-4e7c-4fcf-9fe3-630e132325c0/ExploitPatchThird Party Advisory

FAQ

What is CVE-2022-21649?

CVE-2022-21649 is a vulnerability with a CVSS score of 7.6 (HIGH). 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 occu...

How severe is CVE-2022-21649?

CVE-2022-21649 has been rated HIGH with a CVSS base score of 7.6/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2022-21649?

Check the references section above for vendor advisories and patch information. Affected products include: Convos Convos.