Vulnerability CVE-2023-33186
Published: 2023-05-30

Description:
Zulip is an open-source team collaboration tool with unique topic-based threading that combines the best of email and chat to make remote work productive and delightful. The main development branch of Zulip Server from May 2, 2023 and later, including beta versions 7.0-beta1 and 7.0-beta2, is vulnerable to a cross-site scripting vulnerability in tooltips on the message feed. An attacker who can send messages could maliciously craft a topic for the message, such that a victim who hovers the tooltip for that topic in their message feed triggers execution of JavaScript code controlled by the attacker.

 References:
https://github.com/zulip/zulip/commit/3ca131743b00f42bad8edbac4ef92656d954c629
https://github.com/zulip/zulip/commit/903dbda79bd176702d3175a7c8a5450a64b6eccb
https://github.com/zulip/zulip/security/advisories/GHSA-4r83-8f94-hrph
https://github.com/zulip/zulip/pull/25370
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