CVE-2026-21857

MEDIUM

6.5

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.

Details CVE

Score CVSS v3.16.5

SeveriteMEDIUM

Vecteur CVSSCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N

Vecteur d'attaqueNETWORK

ComplexiteLOW

Privileges requisHIGH

Interaction utilisateurNONE

Publie1/7/2026

Derniere modification1/20/2026

Sourcenvd

Observations honeypot0

Produits affectes

redaxo:redaxo

Faiblesses (CWE)

CWE-22CWE-24

References

https://github.com/redaxo/redaxo/releases/tag/5.20.2(security-advisories@github.com)

https://github.com/redaxo/redaxo/security/advisories/GHSA-824x-88xg-cwrv(security-advisories@github.com)

https://github.com/redaxo/redaxo/security/advisories/GHSA-824x-88xg-cwrv(134c704f-9b21-4f2e-91b3-4a467353bcc0)

Correlations IOC

Aucune correlation enregistree

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