CVE-2026-21857

Redaxo has Path Traversal in Backup Addon Leading to Arbitrary File Read

CVSS 8.3 HIGHEPSS 0.5%CWE-22 CWE-24

Vexday Risk Score

21Baixo

Decisão SSVC (CISA)

Track

Sem sinal de exploração → monitorar

CVSS 8.3EPSS 0.5%KEV nãoPoC —Nuclei —Metasploit —Patch —

Ciclo de vida

07 jan 2026Publicada no NVD

Recomendação: Monitorar — sem sinal de exploração no momento.

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.

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:H/SI:H/SA:N

Produtos afetados

redaxo · redaxo

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Referências

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