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The CVE-2025-XXXXX vulnerability in Drupal core stems from an “Improperly Controlled Modification of Dynamically-Determined Object Attributes” issue. This flaw allows for PHP object injection by manipulating the dynamic setting of object attributes. An attacker can exploit this by providing a malicious serialized string. When this string is deserialized by the vulnerable code, it can be used to instantiate arbitrary objects and control their properties. By populating these properties with specific values, the attacker can trigger destructive methods or achieve remote code execution within the application’s context. The vulnerability is present in code paths that unsafely handle user-supplied input for object property assignment without proper validation, leading to the modification of critical object attributes.
Platform: Drupal Core
Version: 8.0.0-10.4.8
Vulnerability : Object Injection
Severity: Moderate
date: 2025-11-18
Prediction: 2025-11-25
What Undercode Say:
grep -r "unserialize" core/lib/Drupal
find . -name ".php" -exec grep -l "__destruct|__wakeup" {} \;
// Example dangerous pattern
$data = unserialize($_POST['malicious']);
foreach ($data as $key => $value) {
$some_object->$key = $value; // Attacker controls property name
}
How Exploit:
Craft a serialized payload containing objects with dangerous “magic” methods like `__destruct` or __wakeup. Submit this payload via a vulnerable form or endpoint that performs unsafe deserialization and property assignment, leading to the execution of arbitrary code on the server.
Protection from this CVE:
Update to versions 10.4.9, 10.5.6, 11.1.9, or 11.2.8. Avoid unserializing user input. Implement strict type checking and input whitelisting for any dynamic property assignment.
Impact:
Arbitrary Code Execution, Site Compromise, Data Theft.
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Sources:
Reported By: github.com
Extra Source Hub:
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