---
id: CVE-2026-81784
title: >-
  Deserialization of Untrusted Data vulnerability in Marcin Wise Chat wise-chat
  allows Object Injection.This issue affects Wise Chat: from n/a through 3.4.2.
summary: >-
  Deserialization of Untrusted Data vulnerability in Marcin Wise Chat wise-chat
  allows Object Injection.This issue affects Wise Chat: from n/a through 3.4.2.
severity: high
cvss: 8.1
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-502
vendor: Marcin
product: wise-chat
affected:
  - wise-chat <= 3.4.2
published: '2026-09-10'
updated: '2026-10-06'
sourceUpdated: '2026-10-06T10:16:52.377'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-81784'
references:
  - url: >-
      https://patchstack.com/database/wordpress/plugin/wise-chat/vulnerability/wordpress-wise-chat-plugin-3-4-php-object-injection-vulnerability?_s_id=cve
    label: audit@patchstack.com
tags:
  - nvd
  - cve.org
epss: 0.00436
epssPercentile: 0.37697
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-10T20:36:22.366640Z'
ingestedAt: '2026-09-11T16:45:48.023Z'
---

## Overview

Deserialization of Untrusted Data vulnerability in Marcin Wise Chat wise-chat allows Object Injection.This issue affects Wise Chat: from n/a through 3.4.2.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.