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CVE-2026-2520— Online Scheduling and Appointment Booking System – Bookly <= 27.2 - Missing Authorization to Authenticated (Subscriber+) Limited Arbitrary Plugin Update

Quick assessment

Affected
ladela Online Scheduling and Appointment Booking System – Bookly
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WordPress Bookly是WordPress基金会开源的一款预约管理插件。 WordPress Bookly 27.2及之前版本存在授权问题漏洞，该漏洞源于updateAddon函数缺少权限检查，可能导致经过身份验证的订阅者级别及以上攻击者更新任意包含main.php文件的插件至最新版本，从而未授权修改数据。

CVSS 5.4 · Medium EPSS 0.22% · P12

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
ladela Online Scheduling and Appointment Booking System – Bookly ≤ 27.2 affected
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I. Basic Information for CVE-2026-2520

Vulnerability Information
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Vulnerability Title
Online Scheduling and Appointment Booking System – Bookly <= 27.2 - Missing Authorization to Authenticated (Subscriber+) Limited Arbitrary Plugin Update
Source: CVE Program / CVE List V5
Vulnerability Description
The Online Scheduling and Appointment Booking System – Bookly plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the 'updateAddon' function in all versions up to, and including, 27.2. This makes it possible for authenticated attackers, with Subscriber-level access and above, to update any plugin with a main file of 'main.php' to its latest version.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
WordPress Bookly 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress Bookly是WordPress基金会开源的一款预约管理插件。 WordPress Bookly 27.2及之前版本存在授权问题漏洞，该漏洞源于updateAddon函数缺少权限检查，可能导致经过身份验证的订阅者级别及以上攻击者更新任意包含main.php文件的插件至最新版本，从而未授权修改数据。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
ladela Online Scheduling and Appointment Booking System – Bookly 0 ~ 27.2 -

II. Public POCs for CVE-2026-2520

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III. Intelligence Information for CVE-2026-2520

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Proof of Concept for CVE-2026-2520 (2)

Security Blog Posts for CVE-2026-2520 (1)

IV. Related Vulnerabilities

Same product: Online Scheduling and Appointment Booking System – Bookly
Same vendor: ladela
Same weakness: CWE-862

V. Comments for CVE-2026-2520

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