cvedb.io
CVE-2026-21857
MEDIUM · CVSS 6.5
EPSS exploitation probability: 0%
Published 2026-01-07T23:15:50.830 · Last modified 2026-06-17T10:19:02.403

Summary

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.

Affected products

redaxo — redaxo

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.