What is the CVSS score of CVE-2025-52204?

CVE-2025-52204 has a CVSS 3.1 base score of 6.1 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N. EPSS exploitation probability: 0.0%.

Which versions of N A are affected by CVE-2025-52204?

CVE-2025-52204 presents moderate security risk, a cross-site scripting vulnerability rated CVSS 6.1. Attackers could inject scripts to steal sessions or perform actions as authenticated users.

How to fix or mitigate CVE-2025-52204?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Verify Content-Security-Policy and output encoding.

N A CVE-2025-52204

EUVD-2025-208946 MEDIUM

Cross-site Scripting (XSS) (CWE-79)

2026-03-23 mitre

GHSA-79wq-mgjf-5cc2

XSS N A

6.1

CVSS 3.1 · Vendor: mitre

Severity by source

Vendor (mitre) PRIMARY

6.1 MEDIUM

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

Primary rating from Vendor (mitre) · only source for this CVE.

CVSS VectorVendor: mitre

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

EUVD ID Assigned

Mar 23, 2026 - 20:00 euvd

EUVD-2025-208946

Analysis Generated

Mar 23, 2026 - 20:00 vuln.today

CVE Published

Mar 23, 2026 - 00:00 nvd

MEDIUM 6.1

DescriptionCVE.org

A Cross-Site Scripting (XSS) vulnerability exists in Znuny::ITSM 6.5.x in the customer.pl endpoint via the OTRSCustomerInterface parameter

AnalysisAI

A Cross-Site Scripting (XSS) vulnerability exists in Znuny::ITSM 6.5.x where the customer.pl endpoint improperly handles the OTRSCustomerInterface parameter, allowing attackers to inject and execute arbitrary JavaScript in the context of victim browsers. This affects Znuny ITSM versions in the 6.5.x release line, and a proof-of-concept exploit has been publicly disclosed on GitHub, indicating active awareness and potential exploitation capability in the threat landscape.

Technical ContextAI

The vulnerability is rooted in improper input validation and output encoding in a web application parameter handler. Specifically, the OTRSCustomerInterface parameter passed to the customer.pl endpoint in Znuny::ITSM fails to sanitize or properly encode user-supplied input before reflecting it back in HTTP responses. This is a classic reflected XSS vulnerability (CWE category: Improper Neutralization of Input During Web Page Generation). Znuny is an open-source IT Service Management (ITSM) and help desk ticketing system built on the OTRS framework. The affected component (customer.pl) is the customer-facing interface endpoint responsible for handling customer interactions, making it a high-value attack surface for phishing, credential harvesting, and malware distribution campaigns.

RemediationAI

Immediately upgrade Znuny::ITSM to a patched version released after this vulnerability disclosure; check http://znuny.com and http://znunyitsm.com for official security advisories and version numbers. As a temporary mitigation pending patching, implement input validation and output encoding on the OTRSCustomerInterface parameter by deploying a Web Application Firewall (WAF) rule that blocks requests containing script-like payloads (e.g., javascript:, <script>, onerror=), enforce Content-Security-Policy (CSP) headers to restrict script execution origins, and restrict access to the customer.pl endpoint to known trusted IP ranges if operationally feasible. Additionally, apply HTTPS with HSTS to prevent man-in-the-middle payload injection, and monitor access logs for suspicious parameter values.