What is the CVSS score of CVE-2025-59788?

CVE-2025-59788 has a CVSS 3.1 base score of 6.4 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N. EPSS exploitation probability: 0.0%.

Which versions of Nextcloud are affected by CVE-2025-59788?

Organizations using a reachable files_pdfviewer example directory in Nextcloud with should be aware of moderate risk from CVE-2025-59788 rated CVSS 6.4.. A patch is available.

How to fix or mitigate CVE-2025-59788?

Within 30 days: Identify affected systems running a reachable files_pdfviewer example directory in Nextcloud w and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.

Nextcloud CVE-2025-59788

EUVD-2025-201255 MEDIUM

Exposed Dangerous Method or Function (CWE-749)

2025-12-04 cve@mitre.org

XSS Nextcloud

6.4

CVSS 3.1

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

Patch available

Apr 16, 2026 - 05:29 EUVD

30.0.17,25.0.13.23,22.2.10.33

EUVD ID Assigned

Mar 15, 2026 - 16:35 euvd

EUVD-2025-201255

Analysis Generated

Mar 15, 2026 - 16:35 vuln.today

CVE Published

Dec 04, 2025 - 19:16 nvd

MEDIUM 6.4

DescriptionNVD

Cross-site scripting (XSS) vulnerability in a reachable files_pdfviewer example directory in Nextcloud with versions before 22.2.10.33, 23.0.12.29, 24.0.12.28, 25.0.13.23, 26.0.13.20, 27.1.11.20, 28.0.14.11, 29.0.16.8, 30.0.17, 31.0.10, and 32.0.1 allows attackers to execute arbitrary JavaScript in the context of a user's browser via a crafted PDF file to viewer.html. This issue is related to CVE-2024-4367, but the root cause of this Nextcloud issue is that the product exposes executable example code on a same-origin basis.

AnalysisAI

Technical ContextAI

Cross-site scripting (XSS) allows injection of client-side scripts into web pages viewed by other users due to insufficient output encoding. This vulnerability is classified as Exposed Dangerous Method or Function (CWE-749).

RemediationAI

Encode all user-supplied output contextually (HTML, JS, URL). Implement Content Security Policy (CSP) headers. Use HTTPOnly and Secure cookie flags.

Vendor StatusVendor

Debian

Bug #941708

nextcloud-server

Release	Status	Fixed Version	Urgency
	open	-	-

CVE-2025-59788 vulnerability details – vuln.today

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