# CVE-2026-63001: REDAXO Media Manager stored XSS in type name

Source: https://junglewise.ai/threats/cve-2026-63001-redaxo-media-manager-stored-xss-in-type-name  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-23. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

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)](https://junglewise.ai/threats/technologies/redaxo-source), [REDAXO](https://junglewise.ai/threats/technologies/redaxo). Vendors: [Packagist](https://junglewise.ai/threats/vendors/packagist), [REDAXO](https://junglewise.ai/threats/vendors/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

  ```sh
  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

## Related threats

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- [REDAXO CSRF token bypass in user administration](https://junglewise.ai/threats/cve-2026-117536-redaxo-before-5-21-3-contains-a-cross-site-request-forgery)
- [REDAXO reflected cross-site scripting in media pool](https://junglewise.ai/threats/cve-2026-117535-redaxo-before-5-21-3-contains-a-reflected-cross-site-scripting)
- [REDAXO cross-site request forgery in article history plugin](https://junglewise.ai/threats/cve-2026-117534-redaxo-before-5-21-3-contains-a-cross-site-request-forgery)
- [REDAXO stored cross-site scripting in mediapool SVG uploads](https://junglewise.ai/threats/cve-2026-117533-redaxo-from-5-18-0-before-5-21-4-contains-a-stored-cross-site)