PT-2026-54833 · Mco · Mco

Hubert Decyusz · Published 2026-07-01 · Updated 2026-07-06 · CVE-2026-53907

Positive Technologies (AI Summary)

CVSS v3.1

5.4

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions MCO version 25.3.3.1

Description The software is subject to Stored Cross-Site Scripting (XSS), a flaw where malicious scripts are permanently stored on the target server. This occurs through the application logo upload functionality, allowing an attacker with permissions to change the logo to upload a crafted SVG file containing malicious JavaScript. The script executes when the logo is rendered or opened.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-53907

Affected Products

Mco

References · 7

• https://nvd.nist.gov/vuln/detail/CVE-2026-53907 · Security Note
• https://twitter.com/infoflowcloud/status/2072325816403280042 · Twitter Post
• https://cert.pl/en/posts/2026/07/CVE-2026-53902 · Note
• https://twitter.com/CVEnew/status/2072324845673570730 · Twitter Post
• https://t.me/cveNotify/188712 · Telegram Post
• https://t.me/cveNotify/183675 · Telegram Post
• https://mco.mycomplianceoffice.com · Note