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Vulnerability in Magnolia CMS software
10 August 2026 | CERT Polska | #vulnerability, #warning, #cve
CVE ID CVE-2026-18478
Publication date 10 August 2026
Vendor Magnolia DXP
Product Magnolia CMS
Vulnerable versions From 6.3.0 to 6.3.10
Vulnerability type (CWE) Improper neutralization of input during web page generation ('cross-site scripting') (CWE-79)
Report source Report to CERT Polska

Description

CERT Polska has received a report about vulnerability in Magnolia CMS software and participated in coordination of its disclosure.

The vulnerability CVE-2026-18478: Magnolia CMS is vulnerable to Stored XSS in import functionality. An attacker with editor privileges can inject arbitrary HTML and JS into the name of uploaded image, which will be rendered/executed when opening uploaded image.

The issue was fixed in version 6.3.10

Credits

We thank Kacper Paluch and Łukasz Sobański for the responsible vulnerability report.

More about the coordinated vulnerability disclosure process at CERT Polska can be found at https://cert.pl/en/cvd/.