CVE-2026-48212
Deferred Deferred - Pending Action

Stored XSS in OTRS Custom Page

Publication date: 2026-10-12

Last updated on: 2026-10-15

Assigner: OTRS AG

Description
An OTRS administrator can enter arbitrary JavaScript into the content of an OTRS Custom Page, which is stored by the application and subsequently executed in the browser of users accessing that page. This issue affects OTRS: * 7.0.X * 8.0.X * 2023.X * 2024.X * 2025.X * 2026.X before 2026.7.X

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Meta Information

Published
2026-10-12
Last Modified
2026-10-15
Generated
2026-11-08
AI Q&A
2026-10-12
EPSS Evaluated
2026-11-07
NVD
CVE-2026-48212
EUVD
EUVD-2026-97264

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

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Executive Summary

This is a Stored Cross-site Scripting (XSS) vulnerability in OTRS. An administrator can inject malicious JavaScript into a Custom Page, which is then stored and executed in the browsers of users who access that page.

Detection Guidance

Check OTRS Custom Pages for suspicious JavaScript content. Review browser console logs for unexpected script execution when accessing custom pages. Inspect network traffic for unauthorized data exfiltration attempts.

Impact Analysis

Attackers could steal user session cookies, redirect users to malicious sites, or perform actions on behalf of users. Users accessing the compromised Custom Page may have their data exposed or their sessions hijacked.

Compliance Impact

This vulnerability could lead to unauthorized data access or modification, violating GDPR's data protection principles or HIPAA's security requirements for protected health information. Organizations may face compliance penalties if user data is compromised.

Mitigation Strategies

Update OTRS to version 2026.7.1 or later immediately. If using OTRS 7, migrate to a supported version as no further patches will be released. Restrict administrator access to trusted personnel only.

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