| Titel | Vaelsys Vaelsys V4 4.1.0 Command Injection / Remote Code Execution |
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| Beschreibung | A critical vulnerability has been identified in the Vaelsys V4 Platform v4.1.0, which allows for Unauthenticated Remote Code Execution (RCE) via the tree_server.php endpoint. The flaw exists due to improper neutralization of special elements used in an OS command ('OS Command Injection') within the xajaxargs[] parameter.
The vulnerability resides in the backend processing of the execute_DataObjectProc function. When the application handles a request to set the system timezone (setSystemTimezone), it fails to properly sanitize the input passed within the <v> tag of the xjxobj structure.
Specifically, the application takes the user-supplied string and concatenates it directly into a system-level shell command (likely using PHP functions such as system(), exec(), or shell_exec()). By injecting shell metacharacters such as a semicolon (;), an attacker can terminate the intended command and append arbitrary OS commands.
An attacker can trigger this vulnerability by sending a crafted POST request to /tree/tree_server.php. For example, using the payload:
; echo '<?php echo "helloworld";?>' > /opt/vaelsysV4/www/23.php; #
The system executes the injected command, creating a persistent PHP webshell in the web root. Subsequent access to /23.php confirms successful code execution under the privileges of the web server user (e.g., nginx) |
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| Quelle | ⚠️ https://github.com/CVE-Hunter-Leo/CVE/issues/10 |
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| Benutzer | CW.Wong (UID 88449) |
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| Einreichung | 10.02.2026 07:59 (vor 4 Monaten) |
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| Moderieren | 21.02.2026 22:06 (12 days later) |
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| Status | Akzeptiert |
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| VulDB Eintrag | 347318 [Vaelsys VaelsysV4 bis 4.1.0.20201125 Web interface /tree/tree_server.php xajaxargs erweiterte Rechte] |
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| Punkte | 20 |
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