Headline
CVE-2022-23656: Build software better, together
Zulip is an open source team chat app. The main development branch of Zulip Server from June 2021 and later is vulnerable to a cross-site scripting vulnerability on the recent topics page. An attacker could maliciously craft a full name for their account and send messages to a topic with several participants; a victim who then opens an overflow tooltip including this full name on the recent topics page could trigger execution of JavaScript code controlled by the attacker. Users running a Zulip server from the main branch should upgrade from main (2022-03-01 or later) again to deploy this fix.
Affected versions
main branch (2021-06-03 to 2022-03-01)
Patched versions
main branch (2022-03-01)
Impact
The main development branch of Zulip Server from June 2021 and later is vulnerable to a cross-site scripting vulnerability on the recent topics page. An attacker could maliciously craft a full name for their account and send messages to a topic with several participants; a victim who then opens an overflow tooltip including this full name on the recent topics page could trigger execution of JavaScript code controlled by the attacker.
Patches
The vulnerability was fixed in the main branch with commit e090027. Users running a Zulip server from the main branch should upgrade from main again to deploy this fix.
CVE ID
CVE-2022-23656
GHSA ID
GHSA-fc77-h3jc-6mfv
CWEs
CVSS Score
4.6 Moderate
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N