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CVE-2023-33186

8.2 · HIGH

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.

Published May 30, 2023CWE-79EPSS 0.62%

Overview

CVE-2023-33186 is a high-severity vulnerability. It was published on May 30, 2023 and has a CVSS 3.1 base score of 8.2 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.2, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/zulip/zulip/commit/03cfb3d9fe61c975d133121ec31a7357f0c9e18fGitHubgithub.com/zulip/zulip/commit/3ca131743b00f42bad8edbac4ef92656d954c629GitHubgithub.com/zulip/zulip/pull/25370GitHubgithub.com/zulip/zulip/security/advisories/GHSA-4r83-8f94-hrphGitHubgithub.com/zulip/zulip/commit/03cfb3d9fe61c975d133121ec31a7357f0c9e18fGitHubgithub.com/zulip/zulip/commit/3ca131743b00f42bad8edbac4ef92656d954c629GitHubgithub.com/zulip/zulip/pull/25370GitHubgithub.com/zulip/zulip/security/advisories/GHSA-4r83-8f94-hrph

How CyberStrike helps

Frequently asked questions

What is CVE-2023-33186?

CVE-2023-33186 is a high-severity vulnerability. It was published on May 30, 2023 and has a CVSS 3.1 base score of 8.2 (HIGH).

How severe is CVE-2023-33186?

This vulnerability has a CVSS 3.1 base score of 8.2, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2023-33186?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2023-33186?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-33186 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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