CVE-2026-116900

Medium

Description

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.

SeverityMedium

CVSS5.4

Exploit probability—

Product

Redaxo Core

PublishedOct 27, 2026

First seenOct 27, 2026

Weakness typeCWE-79Cross-site scripting (XSS)

How to fix

Update

redaxo core5.21.4 or later

Vendor advisories

github.com/redaxo/core/security/advisories/GHSA-5wmj-5x79-rr87

Affected products

Product	Affected versions	Fixed in
redaxo core	v < 5.21.4	5.21.4

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