CVE-2023-33186: Cross-site scripting vulnerability in Zulip Server development branch via topic tooltip
First published: Tue May 30 2023(Updated: )
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.
Credit: security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Zulip Server | =7.0-beta1 | |
| Zulip Server | =7.0-beta2 |
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Reference Links
- 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
- https://github.com/zulip/zulip/commit/03cfb3d9fe61c975d133121ec31a7357f0c9e18f
Frequently Asked Questions
What is CVE-2023-33186?
CVE-2023-33186 is a cross-site scripting vulnerability in Zulip Server development branch via topic tooltip.
What is Zulip Server?
Zulip Server is an open-source team collaboration tool with unique topic-based threading that combines the best of email and chat.
What versions of Zulip Server are affected by CVE-2023-33186?
Zulip Server versions 7.0-beta1 and 7.0-beta2 are affected by CVE-2023-33186.
What is the severity of CVE-2023-33186?
CVE-2023-33186 has a severity of 8.2 (high).
How can I fix CVE-2023-33186?
To fix CVE-2023-33186, update your Zulip Server installation to a version that includes the necessary security patches.
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