CVE-2026-18478

EUVD-2026-55624
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
Cross-site Scripting
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
UNKNOWN
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Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Common Weakness Enumeration
References
https://cert.pl/en/posts/2026/08/CVE-2026-18478
https://docs.magnolia-cms.com/product-docs/6.3/releases/release-notes-for-magnolia-cms-6.3.10/
https://www.magnolia-cms.com/