XSS in Redaxo Core
CVE-2026-117533
REDAXO from 5.18.0 before 5.21.4 contains a stored cross-site scripting vulnerability because rex_media_service moves uploaded SVG files into the public media folder before sanitizing them. Authenticated users with mediapool upload rights can race the sanitizer or exhaust memory limits to leave script-laden SVGs publicly served, executing scripts in victims' backend sessions.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/redaxo/core/security/advisories/GHSA-2p3g-jr7p-qwwx (vendor-advisory)
- www.vulncheck.com/advisories/redaxo-5.18.0-before-5.21.4-stored-xss-via-unsanit… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-117533?
- CVE-2026-117533 is a medium-severity vulnerability in Redaxo Core, classified under Cross-site Scripting. CVSS score: 4.4/10. Published 2026-10-27.
- How severe is CVE-2026-117533?
- Medium severity. CVSS v3 base score is 4.4 out of 10.