TI-2026-79593 Aliases CVE-2026-112862 GHSA-j354-jq2c-82gj

Object injection in WordPress Participants Database plugin

MEDIUM 49CWE-502Published 2026-10-23 · Updated 2026-10-23

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
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

The xnau webdesign Participants Database plugin for WordPress, through 2.7.8.5, deserializes untrusted data without proper checks, which allows PHP object injection (CWE-502). An unauthenticated remote attacker can exploit this over the network without user interaction, and the impact reaches confidentiality, integrity and availability.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

Deserialization of Untrusted Data vulnerability in xnau webdesign Participants Database participants-database allows Object Injection.This issue affects Participants Database: from n/a through 2.7.8.5.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00408 35th 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: Yes
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
xnau webdesign	Participants Database	up to 2.7.8.5	—	No fix listed	CNA

Participants Database Vendorxnau webdesign Affected up to 2.7.8.5 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for Participants Database.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Timeline

2026-10-23 Threatist record created from CVE-2026-112862
2026-10-23 Alias added: GHSA-j354-jq2c-82gj
2026-10-23 CISA SSVC decision points changed

References

Other 1

https://patchstack.com/database/wordpress/plugin/participants-database/vulnerability/wordpress-participants-database-plugin-2-7-8-5-php-object-injection-vulnerability?_s_id=cve

TI-2026-79592 SQL injection in WordPress Participants Database plugin CVSS 3.1CRITICAL 9.3
TI-2026-76984 Authorization bypass in WordPress Participants Database plugin CVSS 3.1MEDIUM 6.3
TI-2025-35860 WordPress Participants Database Plugin <= 2.7.6.3 - 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