---
id: CVE-2026-81784
title: WordPress Wise Chat plugin <= 3.4 - PHP Object Injection vulnerability
summary: Unauthenticated PHP Object Injection in Wise Chat <= 3.4 versions.
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'
cvssSource: cna
cwe:
  - CWE-502
vendor: Marcin
product: wise-chat
affected:
  - wise-chat >= n/a <= 3.4
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-10T20:36:22.366640Z'
published: '2026-09-10'
updated: '2026-09-10'
sourceUpdated: '2026-09-10T21:00:25.712Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=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
tags:
  - cve.org
epss: 0.00436
epssPercentile: 0.35271
ingestedAt: '2026-09-11T16:45:48.023Z'
---

## Overview

Unauthenticated PHP Object Injection in Wise Chat <= 3.4 versions.

## Affected

- `wise-chat >= n/a <= 3.4`

## Remediation

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