CVE-2026-57705 Overview
CVE-2026-57705 is a missing authorization vulnerability in the Nexcess Event Tickets plugin for WordPress. The flaw affects all versions of the event-tickets plugin up to and including 5.28.5. Attackers can exploit incorrectly configured access control security levels to perform actions without proper permission checks.
The vulnerability is classified under CWE-862 (Missing Authorization) and is exploitable over the network without authentication or user interaction. Successful exploitation impacts data integrity within affected WordPress installations that use Event Tickets for event management and ticketing operations.
Critical Impact
Unauthenticated network attackers can bypass access controls in Event Tickets ≤ 5.28.5 to modify data managed by the plugin.
Affected Products
- Nexcess Event Tickets WordPress plugin versions up to and including 5.28.5
- WordPress sites running Event Tickets for event registration and ticket sales
- WordPress environments where the vulnerable event-tickets plugin remains active
Discovery Timeline
- 2026-07-13 - CVE-2026-57705 published to NVD
- 2026-07-13 - Last updated in NVD database
Technical Details for CVE-2026-57705
Vulnerability Analysis
The Event Tickets plugin exposes functionality that fails to verify whether the requesting user holds the required permission before executing sensitive operations. The plugin relies on incorrectly configured access control security levels, meaning capability or nonce checks are either absent or improperly enforced on specific endpoints.
Because the attack vector is network-based and requires no authentication or user interaction, any remote actor who can reach the WordPress site can invoke the affected functionality. Impact is scoped to integrity, indicating attackers can alter data handled by the plugin without directly exposing confidential information or causing service disruption.
See the Patchstack Vulnerability Report for additional technical context.
Root Cause
The root cause is the absence of proper authorization checks on plugin endpoints. Code paths that should validate the caller's role, capability, or nonce token instead execute without confirming the user is entitled to perform the requested action. This pattern maps directly to CWE-862, Missing Authorization.
Attack Vector
An unauthenticated attacker crafts HTTP requests to the vulnerable Event Tickets endpoints exposed by a target WordPress site. Because the plugin does not validate authorization on these requests, the attacker can trigger privileged operations reserved for administrators or event organizers. The Patchstack advisory describes the vulnerability as broken access control affecting ticket and event data handling.
No verified proof-of-concept code has been published. The vulnerability mechanism is described in prose only. Refer to the Patchstack advisory linked above for the vendor-approved technical details.
Detection Methods for CVE-2026-57705
Indicators of Compromise
- Unexpected modifications to event, ticket, attendee, or order records created by the Event Tickets plugin.
- HTTP requests to admin-ajax.php, REST routes under /wp-json/tribe/tickets/, or plugin-specific endpoints originating from unauthenticated sessions.
- New or altered plugin content that lacks a corresponding administrator login event in the WordPress audit trail.
Detection Strategies
- Review WordPress access logs for anonymous POST or PUT requests targeting Event Tickets endpoints.
- Correlate database write activity on Event Tickets tables with the absence of authenticated administrator sessions.
- Deploy a web application firewall rule that flags requests to event-tickets routes missing valid _wpnonce parameters or authenticated cookies.
Monitoring Recommendations
- Enable verbose logging on the WordPress installation and forward logs to a centralized SIEM or data lake for retention and correlation.
- Monitor plugin version inventory across all WordPress sites and alert when event-tickets remains at 5.28.5 or earlier.
- Track outbound requests from WordPress hosts for signs of secondary compromise following unauthorized plugin activity.
How to Mitigate CVE-2026-57705
Immediate Actions Required
- Update the Event Tickets plugin to a version later than 5.28.5 as soon as a patched release is available from the vendor.
- Audit all Event Tickets data — including events, tickets, attendees, and orders — for unauthorized modifications.
- Restrict network access to WordPress administrative and REST endpoints where operationally feasible.
Patch Information
Consult the Patchstack Vulnerability Report for the current patch status and fixed version guidance. Versions through 5.28.5 are confirmed vulnerable. Apply the vendor-released fix through the WordPress plugin updater once available.
Workarounds
- Deactivate the event-tickets plugin until a fixed version is installed if the site is not actively selling tickets.
- Deploy web application firewall rules that block unauthenticated requests to Event Tickets REST and AJAX endpoints.
- Apply IP allowlisting on /wp-admin/ and plugin-specific routes to limit exposure to trusted administrators.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
