# CVE-2026-39518: EventPrime IDOR in WordPress plugin allows Subscriber data access

Source: https://junglewise.ai/threats/cve-2026-39518-eventprime-idor-in-wordpress-plugin-allows-subscriber-data-access  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-15. Updated: 2026-06-15  
License: CC BY 4.0 with a link back

CVE-2026-39518 · Severity: high · CVSS 7.1 · Published 2026-06-15

EventPrime is a WordPress plugin used for managing event calendars and bookings. A security flaw allows users with basic 'Subscriber' accounts to access or modify data they should not have permission to see by manipulating internal record identifiers. This could lead to the exposure of sensitive event information or unauthorized changes to database records.

Technologies: [EventPrime](https://junglewise.ai/threats/technologies/eventprime). Vendors: [EventPrime](https://junglewise.ai/threats/vendors/eventprime).

## Quick answers

**Is CVE-2026-39518 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-39518 being exploited in the wild.

**How severe is CVE-2026-39518?** High severity, with a CVSS score of 7.1, published 15 June 2026.

**Which products and versions are affected?** EventPrime <= 4.3.0.0.

**Is there a fix for CVE-2026-39518?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-39518 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-39518?** Check whether you run EventPrime at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

An Insecure Direct Object Reference (IDOR) vulnerability exists in the EventPrime plugin for WordPress (versions 4.3.0.0 and below). The flaw is categorized as CWE-639, where the application fails to properly validate if the requesting user has permission to access a specific object identifier. An attacker authenticated with Subscriber-level privileges can exploit this by modifying input parameters (such as IDs in web requests) to view or interact with data belonging to other users or the system. This can result in unauthorized data disclosure or limited data manipulation. The issue is resolved in version 4.3.0.1.

## Affected products

- EventPrime EventPrime <= 4.3.0.0

## Timeline

- 2026-02-17: other: Vulnerability reported by researcher James Pirstin
- 2026-04-20: advisory: Patchstack published advisory and mitigation rules
- 2026-06-15: disclosed: CVE published to NVD

## References

- [https://patchstack.com/database/wordpress/plugin/eventprime-event-calendar-management/vulnerability/wordpress-eventprime-plugin-4-3-0-0-insecure-direct-object-references-idor-vulnerability?_s_id=cve](https://patchstack.com/database/wordpress/plugin/eventprime-event-calendar-management/vulnerability/wordpress-eventprime-plugin-4-3-0-0-insecure-direct-object-references-idor-vulnerability?_s_id=cve)

## Related threats

- [EventPrime PHP object injection in Subscriber role](https://junglewise.ai/threats/cve-2026-56053-eventprime-php-object-injection-in-subscriber-role)
- [EventPrime PHP Object Injection in Event Calendar Management](https://junglewise.ai/threats/cve-2026-42687-eventprime-php-object-injection-in-event-calendar-management)
- [EventPrime Cross Site Scripting in WordPress plugin](https://junglewise.ai/threats/cve-2026-42686-eventprime-cross-site-scripting-in-wordpress-plugin)
- [EventPrime Missing Authorization in Access Control Security Levels](https://junglewise.ai/threats/cve-2026-42669-eventprime-missing-authorization-in-access-control-security)