---
id: CVE-2026-117537
title: REDAXO before 5.21.0 Reflected XSS via Metainfo API type Parameter
summary: >-
  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 …
severity: medium
cvss: 4.1
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:L'
cvssSource: cna
cwe:
  - CWE-79
vendor: redaxo
product: core
affected:
  - core < 5.21.0
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-27T13:42:34.335410Z'
published: '2026-10-27'
updated: '2026-10-27'
sourceUpdated: '2026-10-27T14:12:21.902Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-117537'
references:
  - url: 'https://github.com/redaxo/core/security/advisories/GHSA-m662-8jrj-cw6v'
    label: GitHub Security Advisory (GHSA-m662-8jrj-cw6v)
  - url: >-
      https://www.vulncheck.com/advisories/redaxo-before-5.21.0-reflected-xss-via-metainfo-api-type-parameter
    label: >-
      VulnCheck Advisory: REDAXO before 5.21.0 Reflected XSS via Metainfo API
      type Parameter
tags:
  - cve.org
ingestedAt: '2026-10-27T16:11:59.440Z'
---

## Overview

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.

## Affected

- `core < 5.21.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.