CVE-2026-21857
MEDIUMRedaxo < 5.20.2 - Path Traversal
Title source: ruleDescription
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.
Exploits (1)
Scores
CVSS v3
6.5
EPSS
0.0003
EPSS Percentile
7.5%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
Details
CWE
CWE-22
CWE-24
Status
published
Products (2)
redaxo/redaxo
< 5.20.2
redaxo/source
0 - 5.20.2Packagist
Published
Jan 07, 2026
Tracked Since
Feb 18, 2026