Vulnerability · Published Aug 10, 2026 · Assigned by CERT-PL
CVE-2026-18478Stored XSS in Magnolia CMS
Medium 5.1
In plain English
A medium-severity cross-site scripting in Magnolia CMS from Magnolia DXP. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 40% of all known vulnerabilities).
Severity (CVSS 4.0)5.1Medium
Exploit odds (30 days)0.5%top 60.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Magnolia DXP | Magnolia CMS | 6.3.0 – before 6.3.10 |
Weakness: CWE-79 · Vector: 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
References
- https://cert.pl/en/posts/2026/08/CVE-2026-18478 third-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