CVE-2025-52204Public exploitNetwork attack vector

Unauthenticated script execution via reflected session parameter

Published Mar 23, 2026 · Updated Mar 23, 2026

Reflected XSS in Znuny::ITSM 6.5.x allows remote attackers to execute script in a user's browser via a crafted customer.pl URL. The customer.pl endpoint reflects the configured CustomerPanelSessionName URL parameter, commonly OTRSCustomerInterface, into the customer login response without safe output encoding. No authentication is required, but a user must open the crafted URL; successful execution can alter displayed content, redirect the browser, or act within the affected application's origin.

CVSS severity6.1
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in Znuny::ITSM 6.5.x allows remote attackers to execute script in a user's browser via a crafted customer.pl URL. The customer.pl endpoint reflects the configured CustomerPanelSessionName URL parameter, commonly OTRSCustomerInterface, into the customer login response without safe output encoding. No authentication is required, but a user must open the crafted URL; successful execution can alter displayed content, redirect the browser, or act within the affected application's origin.

The record

CVE
CVE-2025-52204
Published
Mar 23, 2026
Updated
Mar 23, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 23, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 23, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.1CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1204.001Malicious Link

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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