VULNERABILITY INTELLIGENCE

CVE-2025-52559

CVSS score6.8 MEDIUM
EPSS probability0.28%
CISA KEVNot currently listed
Published2025-07-02
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:N

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/.

Weakness classification

  • security-advisories@github.com: CWE-79

Primary references