PatchTheCVECVE-2026-18478: Magnolia CMS is vulnerable to Stored XSS in import functionality
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Routine
MEDIUM 5.1
CVE-2026-18478 is a medium-severity flaw (CVSS 5.1) affecting affected software. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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
Why this priority
- No elevated risk signals yet
No fix is published yet: follow the downgrade or mitigation steps.
Risk facts
| CVSS score | 5.1 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | Low |
| User interaction | Passive |
| EPSS exploit chance | 0.5% (top 61%) |
| CISA exploited list | No |
| Weakness | CWE-79 |
| Published | 2026-08-10 |
| Last modified | 2026-10-23 |
Publisher (CNA): CERT.PL
Timeline
- Published CVE record published
- Updated Record last modified
Advisories and coverage
Official advisories
- CERT Polska: Vulnerability in Magnolia CMS software 2026-08-10
Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.