CVE-2026-116900 REDAXO before 5.21.4 Stored XSS via Media and Link Input Widgets

Medium 5.1 Published 27 Oct 2026 Updated 27 Oct 2026

Exploited in the wild: Not known
Fix: None listed

What is CVE-2026-116900?

CVE-2026-116900 is a medium-severity vulnerability in redaxo core, published on 27 Oct 2026.

Official 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.

Weakness: CWE-79

Which versions are affected by CVE-2026-116900?

How do I fix CVE-2026-116900?

No fix has been published for CVE-2026-116900 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-116900 being exploited?

There is no known exploitation of CVE-2026-116900 in the wild and no public exploit code.

Sources

Also known as GHSA-34c3-hq82-r6qj, GHSA-5wmj-5x79-rr87.