# CVE-2026-103066: WP BASE Booking SQL injection via subscriber privilege

Source: https://junglewise.ai/threats/cve-2026-103066-improper-neutralization-of-special-elements-used-in-an-sql  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-05. Updated: 2026-10-05  
License: CC BY 4.0 with a link back

CVE-2026-103066 · Severity: high · CVSS 8.5 · Published 2026-10-05

WP BASE Booking is a WordPress plugin for managing appointments and event bookings. A SQL injection vulnerability allows authenticated subscribers to read, modify, or delete the entire website database, including user credentials and confidential business data. The vulnerability affects versions up to 6.4.0 and was patched in version 6.5.0.

Technologies: [WP BASE Booking](https://junglewise.ai/threats/technologies/wp-base-wp-base-booking). Vendors: [WP BASE](https://junglewise.ai/threats/vendors/wp-base).

## Quick answers

**Is CVE-2026-103066 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-103066 being exploited in the wild.

**How severe is CVE-2026-103066?** High severity, with a CVSS score of 8.5, published 5 October 2026.

**Which products and versions are affected?** WP BASE Booking up to and including 6.4.0.

**Is there a fix for CVE-2026-103066?** Yes: fixed in 6.5.0. Until then: Patchstack has issued a mitigation rule to block attacks against this vulnerability. Contact your hosting provider or web developer if immediate updating is not feasible. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-103066 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-103066?** Check whether you run WP BASE Booking at an affected version. 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.

## How to fix

- Fixed in 6.5.0

Patchstack has issued a mitigation rule to block attacks against this vulnerability. Contact your hosting provider or web developer if immediate updating is not feasible.

## Technical details

A blind SQL injection vulnerability exists in WP BASE Booking that allows attackers with subscriber-level privileges to execute arbitrary SQL queries against the WordPress database. The vulnerability does not require elevated permissions or special conditions beyond an authenticated subscriber account. Exploitation enables complete database compromise through data exfiltration, modification, or deletion.

## Affected products

- WP BASE Booking up to and including 6.4.0

## Timeline

- 2026-10-05: disclosed: Published on NVD
- 2026-10-03: patched: Version 6.5.0 released
- 2026-09-16: other: Initially reported to Patchstack by Khanh Nguyen

## References

- [https://wordpress.org/plugins](https://wordpress.org/plugins)
- [https://patchstack.com/database/wordpress/plugin/wp-base-booking-of-appointments-services-and-events/vulnerability/wordpress-wp-base-booking-plugin-6-4-0-sql-injection-vulnerability-2?_s_id=cve](https://patchstack.com/database/wordpress/plugin/wp-base-booking-of-appointments-services-and-events/vulnerability/wordpress-wp-base-booking-plugin-6-4-0-sql-injection-vulnerability-2?_s_id=cve)

## Related threats

- [WP BASE Booking privilege escalation](https://junglewise.ai/threats/cve-2026-118086-subscriber-privilege-escalation-in-wp-base-booking-6-5-2)