What is CVE-2024-8016?

CVE-2024-8016 is a critical-severity vulnerability in Theeventscalendar Events Calendar Pro, classified under Deserialization of Untrusted Data. CVSS score: 9.1/10. Published 2024-08-30.

How severe is CVE-2024-8016?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Is CVE-2024-8016 known to be exploited?

4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Deserialization in Theeventscalendar Events Calendar Pro

CVE-2024-8016

The Events Calendar Pro plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 7.0.2 via deserialization of untrusted input from the 'filters' parameter in widgets. This makes it possible for authenticated attackers, with administrator-level access and above, to inject a PHP Object. The additional presence of a POP chain allows attackers to execute code remotely. In certain configurations, this can be exploitable by lower level users. We confirmed that this plugin installed with Elementor makes it possible for users with contributor-level access and above to exploit this issue.

Vulnerability class: Insecure Deserialization

Published 2024-08-30 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.007 (53.1th percentile), scored 2026-10-07.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 53.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Theeventscalendar Events Calendar Pro
Theeventscalendar The Events Calendar Pro — versions 0

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

Public proof-of-concept exploits

References

www.wordfence.com/threat-intel/vulnerabilities/id/34f0e5a6-0bd3-4734-b7e0-27dc8… (Third Party Advisory)
theeventscalendar.com/release-notes/events-calendar-pro/events-calendar-pro-7-0… (Release Notes)
theeventscalendar.com/blog/news/important-security-update-for-the-events-calend… (Vendor Advisory)

Frequently asked questions

What is CVE-2024-8016?: CVE-2024-8016 is a critical-severity vulnerability in Theeventscalendar Events Calendar Pro, classified under Deserialization of Untrusted Data. CVSS score: 9.1/10. Published 2024-08-30.
How severe is CVE-2024-8016?: Critical severity. CVSS v3 base score is 9.1 out of 10.
Is CVE-2024-8016 known to be exploited?: 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.