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Medium

REDAXO allows Arbitrary File Upload in the mediapool page

  • Disclosed: 05.03.2025
  • Updated: 11.10.2026 10:22

Summary

An arbitrary file upload vulnerability was identified in the redaxo. This flaw permits users to upload malicious files, which can lead to JavaScript code execution and distribute malware.

Details

On the latest version of Redaxo, v5.18.2, the mediapool/media page is vulnerable to arbitrary file upload.

PoC

  1. Log in to the portal then navigate to Mediapool.
  2. Upload a png file (ex: poc.png)

1

  1. Intercept the upload HTTP request on burp suite and change filename: poc.1html, Content-Type:image/html and insert the malicious html code. (ex: <IFRAME SRC="javascript:alert(1);"></IFRAME>)

2

  1. Forward the request.

  2. Navigate to the file.

3 4

Impact

Exploiting an arbitrary file upload vulnerability enables attackers to execute malicious code on a server.

Affected software

Click a technology to see all vulnerabilities affecting it.

PlatformPackageVulnerable versionsFixed in
Composer package redaxo/source < 5.18.3 5.18.3

References

CVSS score 5.4/10
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Weakness (CWE)
CWE-434
Platform
Composer
Package
redaxo/source
Disclosed
05.03.2025
Updated
11.10.2026 10:22

Sources and licenses

OSV / GitHub Advisory Database - GHSA-wppf-gqj5-fc4f - CC BY 4.0

Vulnerability history: redaxo/source

All published vulnerabilities of this package (Composer package), newest first. Shows whether this is a one-off slip or a package that needs watching.

All (18) in the archive
Total entries
18
First → latest
02.2024 09.2026
Without a fix
3
Exploited in attacks
0

Severity breakdown

  • High 4
  • Medium 11
  • Low 3

Disclosures per year

Severity:
  1. Redaxo has a Mediapool isAllowedExtension bypass via multi-segment filename that leads to authenticated RCE on Apache mod_php multi-extension handlers
    High · 7.5 CVE-2026-53599 >= 5.18.2, < 5.21.1 5.21.1
  2. Redaxo has Path Traversal in Backup Addon Leading to Arbitrary File Read
    High CVE-2026-21857 < 5.20.2 5.20.2
  3. REDAXO CMS is vulnerable to RCE attack through its template management component
    High · 7.2 CVE-2025-64050 < 5.20.1 5.20.1
  4. REDAXO allows Arbitrary File Upload in the mediapool page this entry
    Medium · 5.4 CVE-2025-27411 < 5.18.3 5.18.3
  5. Code injection in REDAXO
    High · 7.2 CVE-2024-25298 <= 5.15.1 no fix

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