Is CVE-2026-116900 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-116900 being exploited in the wild.

How severe is CVE-2026-116900?

Medium severity, with a CVSS score of 5.4, published 27 October 2026.

Is there a fix for CVE-2026-116900?

Yes: fixed in 5.21.4. Until then: Until the update can be applied, limit content and metadata editing permissions to trusted users only. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-116900 attacked?

It is attacked over the network, in a web application.

Am I affected by CVE-2026-116900?

Check whether you run REDAXO at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-116900: REDAXO stored cross-site scripting in media and link widgets

CVE-2026-116900 · Severity: medium · CVSS 5.4 · Published 2026-10-27

REDAXO is a content management system that allows authorized users to edit website content and media. A vulnerability in its backend editor allows content editors to inject malicious scripts into media and link input fields, which then execute when administrators or other users open those edited items, potentially allowing attackers to take over admin accounts and compromise the entire site.

Technologies: REDAXO. Vendors: REDAXO.

Quick answers

Is CVE-2026-116900 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-116900 being exploited in the wild.
How severe is CVE-2026-116900?: Medium severity, with a CVSS score of 5.4, published 27 October 2026.
Which products and versions are affected?: REDAXO before 5.21.4.
Is there a fix for CVE-2026-116900?: Yes: fixed in 5.21.4. Until then: Until the update can be applied, limit content and metadata editing permissions to trusted users only. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-116900 attacked?: It is attacked over the network, in a web application.
Am I affected by CVE-2026-116900?: Check whether you run REDAXO at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

Fixed in: 5.21.4

Until the update can be applied, limit content and metadata editing permissions to trusted users only.

Technical details

The media, medialist, link, and linklist input widgets in REDAXO render stored values unescaped into HTML form field value attributes, allowing content with editing permission to break out of the attribute and inject arbitrary HTML and JavaScript. The vulnerability affects the backend widget output in the slice editor, metadata forms, and any rex_form using these widgets; a malicious payload executes in the browser of any user who subsequently opens a form containing that widget, typically an administrator, enabling session hijacking and account takeover.

Affected products

REDAXO REDAXO before 5.21.4

Timeline

2026-08-03: disclosed
2026-10-27: advisory

References

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