CVE-2022-23656

Cross-site scripting vulnerability in Zulip Server

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.

Category

4.6
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.30%
Third-Party Advisory github.com Third-Party Advisory github.com
Affected: zulip zulip
Published at:
Updated at:

References

Link Tags
https://github.com/zulip/zulip/security/advisories/GHSA-fc77-h3jc-6mfv third party advisory
https://github.com/zulip/zulip/commit/e090027adcbf62737d5b1f83a9618a9500a49321 third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2022-23656?
CVE-2022-23656 has been scored as a medium severity vulnerability.
How to fix CVE-2022-23656?
To fix CVE-2022-23656, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2022-23656 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2022-23656 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2022-23656?
CVE-2022-23656 affects zulip zulip.
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