---
id: CVE-2026-116900
title: REDAXO before 5.21.4 Stored XSS via Media and Link Input Widgets
summary: >-
  REDAXO before 5.21.4 contains a stored cross-site scripting vulnerability that
  allows content editors to inject HTML by storing unescaped values rendered by
  media, medialist, link and linklist widgets. Attackers can submit crafted
  REX_IN…
severity: medium
cvss: 5.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N'
cvssSource: cna
cwe:
  - CWE-79
vendor: redaxo
product: core
affected:
  - core < 5.21.4
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-31T02:39:25.380187Z'
published: '2026-10-27'
updated: '2026-10-31'
sourceUpdated: '2026-10-31T02:39:35.418Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-116900'
references:
  - url: 'https://github.com/redaxo/core/security/advisories/GHSA-5wmj-5x79-rr87'
    label: GitHub Security Advisory (GHSA-5wmj-5x79-rr87)
  - url: >-
      https://www.vulncheck.com/advisories/redaxo-before-5.21.4-stored-xss-via-media-and-link-input-widgets
    label: >-
      VulnCheck Advisory: REDAXO before 5.21.4 Stored XSS via Media and Link
      Input Widgets
tags:
  - cve.org
epss: 0.00138
epssPercentile: 0.0322
ingestedAt: '2026-10-27T16:11:59.296Z'
---

## Overview

REDAXO before 5.21.4 contains a stored cross-site scripting vulnerability that allows content editors to inject HTML by storing unescaped values rendered by media, medialist, link and linklist widgets. Attackers can submit crafted REX_INPUT_MEDIA or REX_INPUT_LINK values that break out of the value attribute, executing script in administrators' backend sessions to hijack accounts.

## Affected

- `core < 5.21.4`

## Remediation

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