PT-2022-15004 · Convos · Convos

P0Cas · Published 2022-01-04 · Updated 2022-01-08 · CVE-2022-21649

Positive Technologies (AI Summary)

CVSS v3.1

7.6

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Convos (affected versions not specified)

Description The issue concerns a stored XSS vulnerability in Convos, an open-source multi-user chat application. It occurs because characters starting with "https://" in the chat window create an tag, and there is a lack of escaping for double quotes, although escaping exists for "<" or ">". This allows an attacker to execute malicious scripts using onfocus and autofocus.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2022-21649

GHSA-XMPJ-XWM3-VWW7

Affected Products

Convos

References · 8

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/21xxx/CVE-2022-21649.json · Exploit
• 🔥 https://huntr.dev/bounties/4532a0ac-4e7c-4fcf-9fe3-630e132325c0 · Exploit
• https://github.com/convos-chat/convos/security/advisories/GHSA-xmpj-xwm3-vww7 · Patch
• https://github.com/convos-chat/convos/commit/86b2193de375005ba71d9dd53843562c6ac1847c · Patch
• https://osv.dev/vulnerability/CVE-2022-21649 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2022-21649 · Security Note
• https://t.me/cibsecurity/34967 · Telegram Post
• https://blog.pocas.kr/2021/12/30/2021-12-30-s-xss-convos-chat/#Second-vulnerability · Note