TI-2026-56420 Aliases CVE-2026-81784 GHSA-xxr7-8h46-rxxw

WordPress Wise Chat plugin <= 3.4.2 - PHP Object Injection vulnerability

LOW 38CWE-502Published 2026-09-10 · Updated 2026-10-06

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: High
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-502.

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00436 38th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Marcin	Wise Chat	up to 3.4.2	—	No fix listed	CNA

Wise Chat VendorMarcin Affected up to 3.4.2 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2026-81784
2026-10-03 Alias added: GHSA-xxr7-8h46-rxxw
2026-10-06 Title updated · CNA
2026-10-06 Affected versions changed · CNA

References

Other 1

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

TI-2026-67942 Missing authorization in WordPress Wise Chat plugin CVSS 3.1HIGH 7.1
TI-2026-47307 WordPress Wise Chat plugin <= 3.4.3 - Cross Site Scripting (XSS) vulnerability CVSS 3.1MEDIUM 6.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences