Unauthorized Data Modification in Bookly Plugin for WordPress
CVE-2026-2520

5.4MEDIUM

Key Information:

Vendor

WordPress
Status
Online Scheduling And Appointment Booking System – Bookly
Vendor
CVE Published:
8 September 2026

What is CVE-2026-2520?

The Bookly plugin for WordPress contains a vulnerability that allows authenticated attackers with Subscriber-level access and higher to exploit a missing capability check in the 'updateAddon' function. This oversight enables them to update any plugin that includes a main file named 'main.php' to its latest version, potentially leading to unauthorized data modification and system integrity concerns. Users of the affected plugin versions should promptly apply updates to safeguard their systems against potential exploitation.

Affected Version(s)

Online Scheduling and Appointment Booking System – Bookly 0 <= 27.2

References

https://www.wordfence.com/threat-intel/vulnerabilities/id...
https://plugins.trac.wordpress.org/browser/bookly-respons...
https://plugins.trac.wordpress.org/browser/bookly-respons...

CVSS V3.1

Score:
5.4
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

KoreaInfoSec
.