Quick answers
- Is CVE-2026-18366 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-18366 being exploited in the wild.
- How severe is CVE-2026-18366?
- Critical severity, with a CVSS score of 9.8, published 12 August 2026.
- Which products and versions are affected?
- Worx Events Manager 7.1 through 7.4.0.1.
- Is there a fix for CVE-2026-18366?
- A patch was published on 2026-08-12: Fixed in version 7.4.1 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-18366 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-18366?
- Check whether anything you run is named in the advisory. 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
The vulnerability is a privilege escalation (CWE-269) stemming from improper capability scoping in the Events Manager plugin. The plugin incorrectly maps WordPress capabilities, discarding the core's access control decisions and allowing unauthenticated REST API calls to modify user accounts via /wp-json/wp/v2/users/ endpoints. The attack requires a collision between a user ID and an Events Manager post ID; attackers can force this collision by creating guest bookings (which auto-create user accounts and increment the ID counter). No authentication, nonce, or cookie is required. Once a collision is achieved, an attacker can modify password, email, and roles fields to escalate any account to administrator. The vulnerability affects Events Manager versions 7.1 through 7.4.0.1 and is fixed in 7.4.1.
Affected products
- Worx Events Manager 7.1 through 7.4.0.1
Timeline
- 2026-08-12: disclosed
- 2026-08-12: patched: Fixed in version 7.4.1