CVE-2026-21857

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Source
https://cve.org/CVERecord?id=CVE-2026-21857
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-21857.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-21857
Aliases
Published
2026-01-07T22:32:15.859Z
Modified
2026-01-22T05:51:51.457374Z
Severity
  • 8.3 (High) CVSS_V4 - 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 CVSS Calculator
Summary
Redaxo has Path Traversal in Backup Addon Leading to Arbitrary File Read
Details

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.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/21xxx/CVE-2026-21857.json",
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-22",
        "CWE-24"
    ]
}
References

Affected packages

Git / github.com/redaxo/redaxo

Affected ranges

Type
GIT
Repo
https://github.com/redaxo/redaxo
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
ae554429f0f2a0291f6fab8623931e92c1b51d75

Affected versions

5.*
5.0.0
5.0.0-alpha7
5.0.0-beta1
5.0.0-beta2
5.0.0-rc
5.0.1
5.1.0
5.10.0
5.10.0-beta1
5.10.0-beta2
5.10.1
5.11.0
5.11.0-beta1
5.11.1
5.11.2
5.12.0
5.12.0-beta1
5.12.0-beta2
5.12.0-beta3
5.12.1
5.13.0
5.13.0-beta1
5.13.0-beta2
5.13.1
5.13.2
5.13.3
5.14.0
5.14.0-beta1
5.14.0-beta2
5.14.1
5.14.2
5.14.3
5.15.0
5.15.0-beta1
5.15.1
5.16.0
5.16.0-beta1
5.16.1
5.17.0
5.17.1
5.18.0
5.18.1
5.18.2
5.18.3
5.19.0
5.2.0
5.2.0-beta1
5.20.0
5.20.1
5.3.0
5.4.0
5.4.0-beta1
5.4.0-beta2
5.5.0
5.5.0-beta1
5.5.1
5.6.0
5.6.0-beta1
5.6.1
5.6.2
5.6.3
5.6.4
5.6.5
5.7.0
5.7.0-beta1
5.7.0-beta2
5.7.0-beta3
5.7.1
5.8.0
5.8.0-beta1
5.8.1
5.9.0
5.9.0-beta1
5.9.0-beta2

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-21857.json"