CVE-2022-21649
Stored XSS vulnerability using onfocus and autofocus occurs because escaping exists for "<" or ">" but escaping for double quotes does not exist.
Does this matter?
Lower severity and a low EPSS score (0.93%). Track it; it rarely justifies an emergency change on its own.
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 3.1
- 5.4 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
- EPSS
- 0.93% probability · 59th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-79
- Affected
- convos/convos
- Source
- security-advisories@github.com
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
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.