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CVE-2026-78265: WordPress The Events Calendar plugin <= 6.17.2 - PHP Object Injection vulnerability

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-24 · updated 2026-10-12
• Weakness: CWE-502

Description

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

Affected products

• Nexcess The Events Calendar: through 6.17.2

References

• https://patchstack.com/database/wordpress/plugin/the-events-calendar/vulnerability/wordpress-the-events-calendar-plugin-6-17-2-php-object-injection-vulnerability?_s_id=cve

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