CVE-2026-53907
Received Received - Intake

Stored XSS in MCO via Malicious SVG Logo Upload

Publication date: 2026-07-01

Last updated on: 2026-07-01

Assigner: CERT.PL

Description
MCO is vulnerable to Stored Cross‑Site Scripting (XSS) via the application logo upload functionality. An attacker with the ability to change the application logo can upload a crafted SVG file containing malicious JavaScript code that is executed when the logo is rendered or opened. Because vendor contact attempts were unsuccessful, the vulnerability has only been confirmed in version 25.3.3.1 but may also affect other versions.

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Meta Information

Published
2026-07-01
Last Modified
2026-07-01
Generated
2026-07-01
AI Q&A
2026-07-01
EPSS Evaluated
N/A
NVD
CVE-2026-53907
EUVD
EUVD-2026-40953

Affected Vendors & Products

Currently, no data is known.

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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 vulnerability is a Stored Cross-Site Scripting (XSS) issue in the MCO application. It occurs through the application logo upload functionality, where an attacker who can change the logo uploads a specially crafted SVG file containing malicious JavaScript code. This code is then executed when the logo is rendered or opened.

Impact Analysis

The impact of this vulnerability is that an attacker with permission to change the application logo can execute malicious JavaScript code in the context of the application. This can lead to unauthorized actions, data theft, session hijacking, or other malicious activities when users view or interact with the logo.

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