Description

A security flaw has been discovered in Open-Web-Analytics up to 1.8.1. Affected is the function Event::loadFromArray of the file queue.php of the component Remote Event Queue Endpoint. Performing a manipulation results in deserialization. The attack can be initiated remotely. Upgrading to version 1.8.2 is able to address this issue. The patch is named 78c1222ec0e2119d84684032da1541120a2cdd23. The affected component should be upgraded.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "7.3",
  "pubDate": "2026-09-25T14:17:27.423Z",
  "pubdate": "2026-09-25T14:17:27.423Z",
  "executiveSummary": "A critical security flaw has been identified in Open-Web-Analytics versions up to and including 1.8.1, specifically within the Remote Event Queue Endpoint.\nThe vulnerability is classified as an insecure deserialization issue, which occurs when untrusted or maliciously crafted data is processed by the application's deserialization logic.\nThe flaw allows remote, unauthenticated attackers to initiate an exploit by sending a specifically crafted payload to the vulnerable endpoint.\nSuccessful exploitation of this vulnerability could lead to severe consequences, including Remote Code Execution (RCE) or arbitrary file manipulation, depending on the available gadget chains within the application's environment.\nThis vulnerability poses a significant risk to the integrity, availability, and confidentiality of the affected web server.\nImmediate remediation is required, involving an upgrade to version 1.8.2, which introduces the necessary security hardening to prevent the improper handling of serialized objects.",
  "technicalDetails": "The vulnerability resides in the Event::loadFromArray function located within the queue.php file of the Open-Web-Analytics Remote Event Queue Endpoint.\nThe root cause of the flaw is the insecure deserialization of input data provided via the remote event queue mechanism. In PHP, the deserialization of user-supplied data—typically handled by functions like unserialize()—is inherently dangerous if the input is not strictly validated or sanitized prior to processing.\nWhen the Event::loadFromArray function processes input, it fails to verify the structure or content of the serialized data effectively. An attacker can leverage this by supplying a crafted serialized string containing a malicious object payload. If the application environment contains 'gadget chains'—existing classes that perform sensitive operations (e.g., file system access, system command execution) during object destruction or wakeup—the attacker can trigger these chains to execute arbitrary code.\nThe attack flow begins with the adversary identifying the publicly accessible Remote Event Queue Endpoint. The attacker then constructs a serialized payload designed to leverage available application logic. This payload is transmitted to the endpoint, likely via an HTTP request. Upon receipt, the application's queue.php file passes this data into Event::loadFromArray, where the deserialization process is triggered.\nBecause the input is processed without authentication, the vulnerability is exposed to any remote actor capable of reaching the network-accessible endpoint. The impact of such an attack is typically critical, as it often facilitates full system compromise. Once the gadget chain is executed, the attacker gains the ability to execute code with the privileges of the web server process, potentially leading to unauthorized data exfiltration, service disruption, or further lateral movement within the network.\nThis issue affects all versions of Open-Web-Analytics up to 1.8.1. The remediation provided in patch 78c1222ec0e2119d84684032da1541120a2cdd23 modifies the handling of array-based data to avoid insecure deserialization patterns, effectively mitigating the threat vector used to instantiate arbitrary application objects."
}