Description

Deserialization of untrusted data vulnerability in Next4Biz Information Technologies Inc. CSM (Customer Service Management) allows Code Injection. This issue affects CSM (Customer Service Management): through 07092026. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "9.8",
  "pubDate": "2026-09-07T15:17:32.153Z",
  "pubdate": "2026-09-07T15:17:32.153Z",
  "executiveSummary": "Next4Biz Information Technologies Inc. Customer Service Management (CSM) contains a critical vulnerability stemming from the insecure deserialization of untrusted data.\nThis flaw allows remote attackers to perform arbitrary code injection, potentially leading to full system compromise, unauthorized data access, and remote command execution.\nThe vulnerability affects CSM versions up to and including 07092026. The root cause lies in the application's failure to adequately validate or sanitize serialized objects before processing them.\nExploitation does not require elevated privileges, depending on the specific endpoint configuration, and exposes the application to severe risk, as malicious payloads can be crafted to execute arbitrary instructions within the context of the application service.\nAs the vendor has remained unresponsive to disclosure attempts, the risk to organizations remains high due to the lack of available patches or vendor-supplied guidance.",
  "technicalDetails": "The vulnerability manifests as an insecure deserialization flaw within the Next4Biz CSM application. Insecure deserialization occurs when an application takes untrusted data and uses it to recreate an object without sufficient verification of the input's integrity or origin.\nWhen the CSM platform deserializes user-supplied input, it fails to perform type-checking or enforce constraints on the objects being instantiated. An attacker can supply a specially crafted, malicious serialized object to the application. When the application's backend logic attempts to reconstruct this object, the serialized payload may include instructions that trigger unintended methods or 'gadgets' available within the application's classpath or environment.\nThe attack flow typically follows these steps: 1. Identification of an endpoint or parameter that accepts serialized objects (e.g., via HTTP POST requests, cookies, or hidden form fields). 2. Crafting a malicious object payload using available libraries or gadget chains that, when deserialized, execute system commands or inject arbitrary code. 3. Transmitting the payload to the vulnerable endpoint. 4. Execution of the payload by the server-side runtime during the reconstruction process, bypassing standard security controls.\nThe exploitation allows an attacker to achieve remote code execution (RCE). Once the initial execution is successful, the attacker operates with the same permissions as the application process. This facilitates post-exploitation activities, including sensitive data exfiltration, internal network lateral movement, or complete persistence within the host infrastructure.\nBecause the application does not validate the object graph during deserialization, it is impossible to prevent the instantiation of malicious classes if they are present in the environment. This vulnerability affects all versions of CSM up to 07092026. There is no indication that authentication is a prerequisite for exploitation, meaning the vector is likely exposed to any network path capable of reaching the relevant service endpoint."
}