CVE-2025-52559
Medium
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/.
SeverityMedium
CVSS6.8
Exploit probability—
Product
Zulip Server
PublishedJul 2, 2025
First seenJul 2, 2025
Weakness typeCWE-79Cross-site scripting (XSS)
How to fix
Update
- zulip zulip_server10.4 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| zulip zulip_server | 2.0.1 ≤ v < 10.4, 2.0.0 | 10.4 |
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