XSS in Redaxo Core
CVE-2026-117537
REDAXO before 5.21.0 contains a reflected cross-site scripting vulnerability that allows authenticated attackers to inject scripts via the type parameter of the metainfo_default_fields_create API. Attackers can craft a link with a valid CSRF token and HTML payload that rex_view::message() renders unescaped, executing scripts in a victim's backend session.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.1 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:L.
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-m662-8jrj-cw6v (vendor-advisory)
- www.vulncheck.com/advisories/redaxo-before-5.21.0-reflected-xss-via-metainfo-ap… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-117537?
- CVE-2026-117537 is a medium-severity vulnerability in Redaxo Core, classified under Cross-site Scripting. CVSS score: 4.1/10. Published 2026-10-27.
- How severe is CVE-2026-117537?
- Medium severity. CVSS v3 base score is 4.1 out of 10.