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CVE-2025-52559

6.8 · MEDIUM

Zulip is an open-source team chat application.

Published Jul 2, 2025CWE-79EPSS 0.28%

Overview

CVE-2025-52559 is a medium-severity vulnerability. It was published on July 2, 2025 and has a CVSS 3.1 base score of 6.8 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 6.8, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

Zulip is an open-source team chat application. From versions 2.0.0-rc1 to before 10.4 in Zulip Server, the /digest/ URL of a server shows a preview of what the email weekly digest would contain. This URL, though not the digest itself, contains a cross-site scripting (XSS) vulnerability in both topic names and channel names. This issue has been fixed in Zulip Server 10.4. A workaround for this issue involves denying access to /digest/.

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/175ec1f365b0db982d6eac9019701cbf6e8bc2f2GitHubgithub.com/zulip/zulip/commit/1a8429e338ff53bdcc4b42e7e71b6fffdd84fcd1GitHubgithub.com/zulip/zulip/commit/6608c8777254e73a4b540e5e1c4af92e680a55fcGitHubgithub.com/zulip/zulip/security/advisories/GHSA-vgf2-vw4r-m663

How CyberStrike helps

Frequently asked questions

What is CVE-2025-52559?

CVE-2025-52559 is a medium-severity vulnerability. It was published on July 2, 2025 and has a CVSS 3.1 base score of 6.8 (MEDIUM).

How severe is CVE-2025-52559?

This vulnerability has a CVSS 3.1 base score of 6.8, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2025-52559?

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-2025-52559?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-52559 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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