QuantumCloud Conversational Forms for ChatBot: PHP Object Injection
Summary
The WordPress plugin Conversational Forms for ChatBot by QuantumCloud contains a deserialization flaw (CWE-502) that allows PHP object injection. An unauthenticated remote attacker can send crafted input to the site, which may lead to harmful actions on the server, including code execution depending on other installed plugins and themes. The attack requires no login and no user interaction, so any internet-facing WordPress site with the plugin active is at risk.
Affected
- QuantumCloud Conversational Forms for ChatBot (WordPress plugin, slug conversational-forms)
- Versions up to and including 1.5.1 (CVE text reads "from n/a through 1.5.1")
Fixed in
- Version 1.5.2 (Patchstack reports this as the patched version; vendor confirmation not found)
Workaround
- No vendor-published workaround found.
- Deactivate and remove the plugin if its forms are not needed.
- Consider a WAF or virtual patch while updating, as Patchstack offers a mitigation rule.
Exploitation
- No confirmed exploitation in the wild found at the time of writing.
- Not listed as actively exploited in the CISA KEV catalogue according to aggregators (not checked directly).
- No public proof of concept confirmed by secondary sources.
- Patchstack expects exploitation and calls the flaw highly dangerous; this is a prediction, not evidence of attacks.
Our recommendation
- Check now whether the plugin is installed and which version is active.
- Update to version 1.5.2 or later, or remove the plugin if it is not needed.
- Review recent web server logs for unexpected requests to the plugin.
- Note that the plugin vendor has described these add-ons as outdated; check whether the plugin is still maintained.
- Treat any unpatched, internet-facing site as high priority.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Patchstack advisory patchstack.com
- Vulners CVE record (CVELIST) vulners.com
- Patchstack vulnerability history for the plugin patchstack.com
- Strix CVE-2026-110886 www.strix.ai
- TheHackerWire CVE-2026-110886 www.thehackerwire.com
- QuantumCloud ChatBot add-ons page www.quantumcloud.com
Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 30 Oct 2026, 17:32.
Original description (NVD)
Deserialization of Untrusted Data vulnerability in QuantumCloud Conversational Forms for ChatBot conversational-forms allows Object Injection.This issue affects Conversational Forms for ChatBot: from n/a through 1.5.1.
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
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