CVE-2026-78265

Received Received - Intake

Unauthenticated PHP Object Injection in The Events Calendar

Publication date: 2026-08-24

Last updated on: 2026-08-24

Assigner: Patchstack

Description

Unauthenticated PHP Object Injection in The Events Calendar <= 6.17.2 versions.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-08-24

Last Modified

2026-08-24

Generated

2026-08-25

AI Q&A

2026-08-25

EPSS Evaluated

N/A

NVD

CVE-2026-78265

Affected Vendors & Products

Vendor	Product	Version / Range
the_events_calendar	the_events_calendar	to 6.17.2 (inc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-502	The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.

Attack-Flow Graph

Executive Summary

This is an unauthenticated PHP Object Injection vulnerability in The Events Calendar plugin versions 6.17.2 and below. It allows remote attackers to inject malicious PHP objects without authentication, potentially leading to remote code execution or other attacks.

Impact Analysis

An attacker could exploit this to execute arbitrary code on your server, take control of your website, steal sensitive data, or disrupt services. Since it requires no authentication, any unpatched version is at high risk.

Compliance Impact

This vulnerability could lead to unauthorized data access or breaches, violating GDPR (data protection) and HIPAA (health data privacy) requirements. Organizations may face fines or legal consequences if exploited.

Mitigation Strategies

Update The Events Calendar plugin to the latest version (6.17.3 or higher) to patch the unauthenticated PHP Object Injection vulnerability. If immediate update is not possible, consider disabling the plugin temporarily until patched.

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