PT-2025-27675 · Unknown · Zulip Server

Timabbott · Published 2025-07-02 · Updated 2025-07-02 · CVE-2025-52559

Positive Technologies (AI Summary)

CVSS v3.1

6.8

Medium

Base vector

AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:N

Name of the Vulnerable Software and Affected Versions: Zulip Server versions 2.0.0-rc1 through 10.3

Description: The issue concerns a cross-site scripting (XSS) vulnerability in Zulip Server, specifically affecting the "/digest/" URL, which displays a preview of the email weekly digest. This vulnerability is present in both topic names and channel names.

Recommendations: For Zulip Server versions 2.0.0-rc1 through 10.3, update to version 10.4 to resolve the issue. As a temporary workaround, consider denying access to the "/digest/" URL until the update is applied.

Exploit

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2025-52559

GHSA-VGF2-VW4R-M663

Affected Products

Zulip Server

References · 8

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/52xxx/CVE-2025-52559.json · Exploit
• https://github.com/zulip/zulip/commit/1a8429e338ff53bdcc4b42e7e71b6fffdd84fcd1 · Patch
• https://github.com/zulip/zulip/commit/6608c8777254e73a4b540e5e1c4af92e680a55fc · Patch
• https://github.com/zulip/zulip/security/advisories/GHSA-vgf2-vw4r-m663 · Vendor Advisory
• https://github.com/zulip/zulip/commit/175ec1f365b0db982d6eac9019701cbf6e8bc2f2 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2025-52559 · Security Note
• https://osv.dev/vulnerability/CVE-2025-52559 · Vendor Advisory
• https://twitter.com/CVEnew/status/1940507551336222748 · Twitter Post