Skip to content
Threat Feed
Subscribe
critical advisory

Deserialization of Untrusted Data in QuantumCloud Conversational Forms for ChatBot

The QuantumCloud Conversational Forms for ChatBot plugin is vulnerable to remote object injection via insecure deserialization in versions up to 1.5.1, potentially facilitating remote code execution.

CVE search metadata

CVE search record: CVE-2026-110886. Severity: critical. CVSS: 9.8. KEV: no. Product: Conversational Forms for ChatBot (<= 1.5.1). Brief: Deserialization of Untrusted Data in QuantumCloud Conversational Forms for ChatBot. Brief link: https://feed.craftedsignal.io/briefs/2026-10-quantumcloud-deserialization/

QuantumCloud Conversational Forms for ChatBot (versions through 1.5.1) contains a critical deserialization of untrusted data vulnerability (CVE-2026-110886). This vulnerability allows unauthenticated attackers to trigger object injection, a class of security flaw where improper handling of serialized data objects enables the execution of arbitrary code or unauthorized application logic manipulation. Given the nature of WordPress plugin vulnerabilities of this type, attackers typically deliver malicious payloads via HTTP POST requests directed at specific plugin API endpoints or administrative action handlers. This vulnerability is rated with a CVSS base score of 9.8, indicating high exploitability and significant impact. Defenders should prioritize auditing web server access logs for anomalous request patterns originating from public-facing infrastructure.

Impact

Successful exploitation of this vulnerability allows for unauthenticated remote code execution (RCE) on the underlying web server hosting the WordPress instance. This could result in total system compromise, data exfiltration, lateral movement within the hosting network, and installation of persistent web shells or backdoors. All organizations utilizing QuantumCloud Conversational Forms for ChatBot version 1.5.1 or earlier are at risk and should seek an immediate update or temporarily disable the plugin.

Recommendation

  • Immediately update the QuantumCloud Conversational Forms for ChatBot plugin to the latest available version provided by the vendor.
  • If an update is unavailable, disable or remove the Conversational Forms for ChatBot plugin until a patched version is verified.
  • Implement web application firewall (WAF) rules to inspect POST requests for common object serialization patterns, such as PHP serialized strings starting with O: or a: followed by digits.
  • Review webserver logs for unusual POST requests targeting paths associated with the Conversational Forms for ChatBot plugin.

Immediate actions

Patch or disable the vulnerable plugin version in production environments.

IT Operations 24h

Mitigations

Remove or update the vulnerable QuantumCloud Conversational Forms for ChatBot plugin.

immediate IT Operations

CVE-2026-110886