CVE-2026-18478

Stored XSS in Magnolia CMS

State: Published
Severity: 5.1 Medium
Published: Aug 10, 2026
Updated: Aug 10, 2026
Reserved: Jul 31, 2026

Description

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

Scores

CVSS	Score	Vector	Source
4.0	5.1 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N	CERT-PL

Weaknesses

CWE-79 Improper neutralization of input during web page generation ('cross-site scripting')

Affected Products

Product	Versions
Magnolia CMSMagnolia DXP	6.3.0 to before 6.3.10Affected

References

https://cert.pl/en/posts/2026/08/CVE-2026-18478third-party-advisory
https://docs.magnolia-cms.com/product-docs/6.3/releases/release-notes-for-magnolia-cms-6.3.10/release-notes
https://www.magnolia-cms.com/product

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.