CVE-2026-18478 json
Stored XSS in Magnolia CMS
published 2026-08-10 2 mo ago modified 2026-10-23 16 d ago also EUVD-2026-55624
- cvss
- 5.1
- version 4.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 40%
- public exploits
- 0
- none known
Summary
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
Patch / fix
- Magnolia DXP Magnolia CMS 6.3.10
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 2 mo ago
Exploit prediction
0.46% chance of exploitation in the next 30 days, higher than 40% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 5.1 | 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 |
| CNA | 4.0 | 5.1 | 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Affected products
- Magnolia DXP Magnolia CMS
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
cert.pl
/en/posts/2026/08/CVE-2026-18478
third-party-advisory
-
docs.magnolia-cms.com
/product-docs/6.3/releases/release-notes-for-magnolia-cms-6.3.10/
release-notes
-
magnolia-cms.com
/
product
Sources
- CVE List CVE-2026-18478
- NVD CVE-2026-18478
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.