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TI-2026-76013 Aliases CVE-2026-108123GHSA-2wvw-mp72-5fwj

Missing authorization in WP Booking System exposes booking emails

Priority MEDIUM 41CWE-862Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · None · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-862.

Summary

The WP Booking System (Booking Calendar) plugin for WordPress by murgroland is affected in all versions up to and including 2.1.0.3. The plugin does not properly verify that a user is authorized to perform an action (CWE-862), so unauthenticated attackers can read the stored notification email body of any booking. Attackers can iterate booking_id and email_log_id values to expose customer names, email addresses, phone numbers, messages and booking dates. Any Subscriber-level user can exploit this because the admin_init hook fires on profile.php, which all authenticated users can access.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

The WP Booking System – Booking Calendar plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 2.1.0.3 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 read the stored notification email body of any booking by iterating booking_id and email_log_id, exposing customer PII including names, email addresses, phone numbers, messages, and booking dates intended to be visible only to administrators. This is exploitable by any Subscriber-level user because admin_init fires on profile.php, a wp-admin page accessible to all authenticated users.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01024 63rd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
murgrolandWP Booking System – Booking Calendarup to 2.1.0.3—No fix listedCNA
  • WP Booking System – Booking Calendar Vendormurgroland Affected up to 2.1.0.3 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for WP Booking System (Booking Calendar).

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Timeline

  1. 2026-10-18 Threatist record created from CVE-2026-108123
  2. 2026-10-18 Alias added: GHSA-2wvw-mp72-5fwj
  3. 2026-10-29 EPSS moved to the 50th–90th percentile
  4. 2026-10-30 Priority changed: LOW → MEDIUM

References

Other 6

  • TI-2026-83495 Missing authorization in WP Booking System allows note deletion CVSS 3.1CRITICAL 9.1
  • TI-2026-76022 Missing authorization in WP Booking System allows access escalation CVSS 3.1MEDIUM 6.8
  • TI-2026-76021 Missing authorization in WP Booking System exposes booking data CVSS 3.1MEDIUM 6.5
  • TI-2026-70283 SQL injection in WP Booking System WordPress plugin CVSS 3.1MEDIUM 6.5
  • TI-2026-75287 SQL injection in WP Booking System plugin via orderby parameter CVSS 3.1MEDIUM 4.9

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences