CVE-2025-52559
MEDIUM EPSS 14.0%
Published Jul 2, 202512mo ago · Modified Jun 17, 20262w ago
5.4 CVSS 3.1
Published Jul 2, 2025 12mo ago
Last Modified Jun 17, 2026 2w ago
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/.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction Required
Scope Changed
Confidentiality Low
Integrity Low
Availability None
Threat Intelligence
EPSS Exploit Probability
14.0% percentile
Exploit & Patch Status
No Known Exploit
Patch Available
Weaknesses 1
CWE-79 Cross-site Scripting Injection
Affected Products 2
References 4
- github.com https://github.com/zulip/zulip/commit/175ec1f365b0db982d6eac9019701cbf6e8bc2f2
- github.com https://github.com/zulip/zulip/commit/1a8429e338ff53bdcc4b42e7e71b6fffdd84fcd1
- github.com https://github.com/zulip/zulip/commit/6608c8777254e73a4b540e5e1c4af92e680a55fc
- github.com https://github.com/zulip/zulip/security/advisories/GHSA-vgf2-vw4r-m663
Remediation
- github.com https://github.com/zulip/zulip/commit/175ec1f365b0db982d6eac9019701cbf6e8bc2f2
- github.com https://github.com/zulip/zulip/commit/1a8429e338ff53bdcc4b42e7e71b6fffdd84fcd1
- github.com https://github.com/zulip/zulip/commit/6608c8777254e73a4b540e5e1c4af92e680a55fc
- github.com https://github.com/zulip/zulip/security/advisories/GHSA-vgf2-vw4r-m663