EventON Action User AJAX authorization bypass permits privilege escalation
EventON Action User through 2.5.14 exposes the evoau_save_capability AJAX action without an effective authentication or authorization check. An unauthenticated request can reach update_role_caps() and grant EventON management capabilities plus upload_files to a selected non-administrator WordPress role or user. The administrator role has an early-return guard, but other roles and individual users remain targetable; related exposed handlers can also enumerate user IDs and display names, disclose capability state and nonce values, and alter event-to-user term assignments.
- Component
- EventON Action User
- Plugin slug
eventon-action-user- Affected
- <= 2.5.14
- Safe version
2.5.15- Published
- Jul 24, 2026
- Weakness
- CWE-862 — Missing Authorization
This CVE was published Jul 24, 2026 and is one of 1 known issue for this plugin.
Update, patch or deactivate.
Update EventON Action User to 2.5.15 or later. The vendor's 2.5.15 changelog adds permission checks for AJAX functions. Audit non-administrator roles and users for unexpected EventON or upload_files capabilities, and review event-user assignments for unauthorized changes.
A safe version is available, so updating to that version or later is the preferred remediation. If an immediate update is not practical, consider a targeted application patch or temporarily restricting the affected functionality.
Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.
Technical description
The EventON Action User plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 2.5.14. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for unauthenticated attackers to grant EventON management capabilities and the upload_files capability to any non-administrator WordPress role or user, escalating their privileges within the site. The administrator role is protected by an early-return guard in update_role_caps(), so only non-administrator roles and individual users can be targeted; however, the same unauthenticated exposure also allows attackers to enumerate all WordPress users with their IDs and display names, disclose role and user capability state along with nonce values, and tamper with event-to-user term assignments.
CVE / CNA vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L