CVE-2025-52559: Zulip XSS in digest preview URL
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/.
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of CVE-2025-52559?
The severity of CVE-2025-52559 is classified as medium due to the potential for cross-site scripting (XSS) attacks.
How do I fix CVE-2025-52559?
To fix CVE-2025-52559, upgrade your Zulip Server to a version above 10.4.
Which versions of Zulip Server are affected by CVE-2025-52559?
Zulip Server versions from 2.0.0-rc1 to before 10.4 are affected by CVE-2025-52559.
What vulnerabilities does CVE-2025-52559 present?
CVE-2025-52559 presents a cross-site scripting (XSS) vulnerability through the /digest/ URL.
Is there a known exploit for CVE-2025-52559?
As of now, there is no publicly available exploit specifically targeting CVE-2025-52559.