CVE-2026-81784 | BDVDB-2026-371321 Detail

MarcinWise Chat

Description#

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.

Impact#

Object Injection

Weaknesses#

CWE-502 Deserialization of Untrusted Data

References#

https://patchstack.com/database/wordpress/plugin/wise-chat/vulnerability/wordpress-wise-chat-plugin-3-4-php-object-injection-vulnerability?_s_id=cve

Exploit#

No public exploit known

History#

Version 12026-09-10Record published in the CVE List.
Version 22026-10-06Most recent update recorded in the CVE List.

Published

Published: 2026-09-10
Last modified: 2026-10-06

Vendor information

Vendor: Marcin
Product: Wise Chat

All Marcin vulnerabilities

Score

8.1 High

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 38.1.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Insecure Deserialization

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
<= 3.4.2
Fixed
Not stated

Scoring System

CVSS v4.0

Not available

CVSS v3.1

8.1 High

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Metric breakdown
Attack Vector	Network
Attack Complexity	High
Privileges Required	None
User Interaction	None
Scope	Unchanged
Confidentiality	High
Integrity	High
Availability	High

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).