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.
Impact
The
maindevelopment 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
mainbranch with commit e090027. Users running a Zulip server from themainbranch should upgrade frommainagain to deploy this fix.