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6.8
MEDIUM CVSS 3.1
CVE-2025-52559
Zulip XSS in digest preview URL
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/.

INFO

Published Date :

July 2, 2025, 8:15 p.m.

Last Modified :

Aug. 27, 2025, 1:37 p.m.

Remotely Exploit :

Yes !

Source :

[email protected]
Affected Products

The following products are affected by CVE-2025-52559 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Zulip zulip
2 Zulip zulip_server
: Total Affected Vendor : 1 | Products : 2
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 MEDIUM [email protected]
CVSS 3.1 MEDIUM [email protected]
Solution
Update Zulip Server to version 10.4 or later to fix the XSS vulnerability.
  • Update Zulip Server to version 10.4 or later.
  • Restrict access to the /digest/ URL if an update is not possible.
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2025-52559.

URL Resource
https://github.com/zulip/zulip/commit/175ec1f365b0db982d6eac9019701cbf6e8bc2f2 Patch
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 Patch Vendor Advisory
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2025-52559 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2025-52559 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2025-52559 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2025-52559 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • Initial Analysis by [email protected]

    Aug. 27, 2025

    Action Type Old Value New Value
    Added CVSS V3.1 AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
    Added CPE Configuration OR *cpe:2.3:a:zulip:zulip:*:*:*:*:*:*:*:* versions from (including) 2.0.1 up to (excluding) 10.4 *cpe:2.3:a:zulip:zulip:2.0.0:rc1:*:*:*:*:*:*
    Added Reference Type GitHub, Inc.: https://github.com/zulip/zulip/commit/175ec1f365b0db982d6eac9019701cbf6e8bc2f2 Types: Patch
    Added Reference Type GitHub, Inc.: https://github.com/zulip/zulip/commit/1a8429e338ff53bdcc4b42e7e71b6fffdd84fcd1 Types: Patch
    Added Reference Type GitHub, Inc.: https://github.com/zulip/zulip/commit/6608c8777254e73a4b540e5e1c4af92e680a55fc Types: Patch
    Added Reference Type GitHub, Inc.: https://github.com/zulip/zulip/security/advisories/GHSA-vgf2-vw4r-m663 Types: Patch, Vendor Advisory
  • New CVE Received by [email protected]

    Jul. 02, 2025

    Action Type Old Value New Value
    Added 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/.
    Added CVSS V3.1 AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:N
    Added CWE CWE-79
    Added Reference https://github.com/zulip/zulip/commit/175ec1f365b0db982d6eac9019701cbf6e8bc2f2
    Added Reference https://github.com/zulip/zulip/commit/1a8429e338ff53bdcc4b42e7e71b6fffdd84fcd1
    Added Reference https://github.com/zulip/zulip/commit/6608c8777254e73a4b540e5e1c4af92e680a55fc
    Added Reference https://github.com/zulip/zulip/security/advisories/GHSA-vgf2-vw4r-m663
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
Base CVSS Score: 6.8
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact