Is CVE-2026-63001 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-63001 being exploited in the wild.

How severe is CVE-2026-63001?

Medium severity, with a CVSS score of 4.8, published 23 September 2026.

Which products and versions are affected?

redaxo/source (Packagist) <= 5.21.1, ECOSYSTEM:introduced=0,fixed=5.21.2; REDAXO 5.x.

Is there a fix for CVE-2026-63001?

Yes. redaxo/source (Packagist): upgrade to 5.21.2 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-63001 attacked?

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

Am I affected by CVE-2026-63001?

Check whether you run redaxo/source (Packagist) or 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-2026-63001: REDAXO Media Manager stored XSS in type name

Q: Is there a fix for CVE-2026-63001?

Yes. redaxo/source (Packagist): upgrade to 5.21.2 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

Q: How is CVE-2026-63001 attacked?

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

Q: Am I affected by CVE-2026-63001?

Check whether you run redaxo/source (Packagist) or 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-2026-63001 · Severity: medium · CVSS 4.8 · Published 2026-09-23

REDAXO CMS is a content management system used to build and manage websites. An administrator with access to the Media Manager addon can inject malicious code into a media type name. When any other administrator tries to delete a media file linked to that type, the injected code executes in their browser session, allowing account takeover or credential theft.

Technologies: redaxo/source (Packagist), REDAXO. Vendors: Packagist, REDAXO.

Quick answers

Is CVE-2026-63001 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-63001 being exploited in the wild.
How severe is CVE-2026-63001?: Medium severity, with a CVSS score of 4.8, published 23 September 2026.
Which products and versions are affected?: redaxo/source (Packagist) <= 5.21.1, ECOSYSTEM:introduced=0,fixed=5.21.2; REDAXO 5.x.
Is there a fix for CVE-2026-63001?: Yes. redaxo/source (Packagist): upgrade to 5.21.2 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-63001 attacked?: It is attacked over the network, in a web application.
Am I affected by CVE-2026-63001?: Check whether you run redaxo/source (Packagist) or 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

redaxo/source (Packagist): upgrade to 5.21.2 or later
```
composer require redaxo/source:^5.21.2
```

Technical details

A stored XSS vulnerability exists in REDAXO 5.x's Media Manager addon, specifically in the `mediaIsInUse()` function in `redaxo/src/addons/media_manager/lib/media_manager.php`. When a media file deletion is attempted, the function constructs an HTML warning message that includes the media type's name field without HTML escaping via `rex_escape()`. The vulnerable code directly concatenates `$sql->getValue('name')` into an HTML anchor tag. An attacker with administrator privileges can store an XSS payload (e.g., `<img src=x onerror=alert(...)>`) in a media type name, which persists in the database. When any administrator subsequently tries to delete a media file referenced by that type's effects, the payload executes in their browser with full session privileges. Input validation in `types.php` line 200 does not block HTML/JavaScript-relevant characters. The fix requires adding `rex_escape()` around the name value before HTML concatenation.

Affected products

REDAXO REDAXO 5.x

Identifiers

CVE-2026-63001
GHSA-mf2p-wjp4-99pq

Timeline

2026-09-23: disclosed
2026-09-23: advisory: GHSA-mf2p-wjp4-99pq

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