Vulnerability · Published Mar 2, 2022 · Assigned by GitHub_M

CVE-2022-23656Cross-site scripting vulnerability in Zulip Server

Medium 4.6

In plain English

A medium-severity cross-site scripting in zulip from zulip. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 48% of all known vulnerabilities).

Severity (CVSS 3.1)4.6Medium

Exploit odds (30 days)0.6%top 51.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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 products (as reported)

Vendor	Product	Versions
zulip	zulip	>= 2021-06-03, < 2022-03-01

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N

References

https://github.com/zulip/zulip/security/advisories/GHSA-fc77-h3jc-6mfv x_refsource_CONFIRM
https://github.com/zulip/zulip/commit/e090027adcbf62737d5b1f83a9618a9500a49321 x_refsource_MISC