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    <link>https://cve.radiocsirt.org</link>
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    <lastBuildDate>Wed, 07 Oct 2026 16:58:04 +0000</lastBuildDate>
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      <title>CVE-2026-21857 — Redaxo has Path Traversal in Backup Addon Leading to Arbitrary File Read</title>
      <link>https://cve.radiocsirt.org/vuln/cve-2026-21857</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; redaxo&lt;/p&gt;
&lt;p&gt;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&amp;#39;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.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; redaxo&lt;/p&gt;
&lt;p&gt;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&amp;#39;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.&lt;/p&gt;</content:encoded>
      <guid isPermaLink="false">https://cve.radiocsirt.org/vuln/cve-2026-21857</guid>
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