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Case File

CVE-2017-20206

CRITICAL · CVSS 9.8 EPSS 0.69% Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2025-10-18 · Last synced 2026-08-04

CyberRota Analysis

This is a critical severity vulnerability with a CVSS score of 9.8. It affects WordPress. Public exploit code or proof-of-concept references have been detected in its references. Exploitation may require the attacker to be authenticated.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Detected Signals
exploit

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2017-20206
Severity
CRITICAL
CVSS
9.8
EPSS
0.69%
WordPress

Original NVD Description

The Appointments plugin for WordPress is vulnerable to PHP Object Injection in versions up to, and including, 2.2.1 via deserialization of untrusted input from the `wpmudev_appointments` cookie. This allows unauthenticated attackers to inject a PHP Object. Attackers were actively exploiting this vulnerability with the WP_Theme() class to create backdoors.

Related CVEs

Other vulnerabilities affecting the same vendor(s)