XSS in Zulip
CVE-2025-52559
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, cont…
Vulnerability class: XSS (Cross-Site Scripting)
EPSS: 0.002 (39.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:N.
Affected products
- Zulip — versions >= 2.0.0-rc1, < 10.4
Weakness classification (CWE)
References
- https://github.com/zulip/zulip/security/advisories/GHSA-vgf2-vw4r-m663 (x_refsource_CONFIRM)
- https://github.com/zulip/zulip/commit/175ec1f365b0db982d6eac9019701cbf6e8bc2f2 (x_refsource_MISC)
- https://github.com/zulip/zulip/commit/1a8429e338ff53bdcc4b42e7e71b6fffdd84fcd1 (x_refsource_MISC)
- https://github.com/zulip/zulip/commit/6608c8777254e73a4b540e5e1c4af92e680a55fc (x_refsource_MISC)
Frequently asked questions
- What is CVE-2025-52559?
- CVE-2025-52559 is a medium-severity vulnerability in Zulip, classified under Cross-site Scripting. CVSS score: 6.8/10. Published 2025-07-02.
- How severe is CVE-2025-52559?
- Medium severity. CVSS v3 base score is 6.8 out of 10.