Eventin <= 4.1.20 - Insecure Direct Object Reference to Authenticated (Contributor+) Schedule Deletion and Modification
The Eventin plugin for WordPress is vulnerable to Insecure Direct Object Reference in versions up to, and including, 4.1.20. This is due to the permission check reading the subject ID from the request body parameter ids while the handler read it from the URL parameter id, allowing an attacker to authorize against their own schedule and execute against a victim's. This makes it possible for authenticated attackers, with contributor-level access and above, to delete or modify schedules belonging to other users by supplying a victim's schedule ID in the URL path while carrying their own schedule ID in the request body to pass the ownership check.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| WordPress plugin | Eventin – Events Calendar, Tickets, Registration, Booking & WooCommerce | <= 4.1.20 | 4.1.21 |
References
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L- Weakness (CWE)
CWE-639- Platform
- WordPress
- Package
Eventin – Events Calendar, Tickets, Registration, Booking & WooCommerce- Disclosed
- 17.08.2026
- Updated
- 11.10.2026 10:22
Sources and licenses
Wordfence Intelligence - 22eda61d-c802-4e9b-a68c-d5ff7d69890c - Wordfence Intelligence
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Vulnerability history: Eventin – Events Calendar, Tickets, Registration, Booking & WooCommerce
All published vulnerabilities of this package (WordPress plugin), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 55
- First → latest
- 02.2024 10.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Critical 1
- High 14
- Medium 40
Disclosures per year
- 2024: 6
- 2025: 10
- 2026: 39
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Eventin <= 4.1.20 - Insecure Direct Object Reference to Authenticated (Contributor+) Schedule Deletion and Modification this entry
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