Description

REDAXO is a PHP-based content management system. Prior to version 5.20.2, authenticated users with backup permissions can read arbitrary files within the webroot via path traversal in the Backup addon's file export functionality. The Backup addon does not validate the `EXPDIR` POST parameter against the UI-generated allowlist of permitted directories. An attacker can supply relative paths containing `../` sequences (or even absolute paths inside the document root) to include any readable file in the generated `.tar.gz` archive. Version 5.20.2 fixes this issue.

INFO

Published Date :

2026-01-07T22:32:15.859Z

Last Modified :

2026-01-08T18:17:35.890Z

Source :

GitHub_M
AFFECTED PRODUCTS

The following products are affected by CVE-2026-21857 vulnerability.

Vendors Products
Redaxo
  • Redaxo
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-21857.

URL Resource
https://github.com/redaxo/redaxo/releases/tag/5.20.2 cve-icon cve-icon
https://github.com/redaxo/redaxo/security/advisories/GHSA-824x-88xg-cwrv cve-icon cve-icon cve-icon
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