Online Scheduling and Appointment Booking System <= 27.7 - Unauthenticated Stored Cross-Site Scripting via bookly_speed_up_update_addons AJAX action
Summary
| CVE | CVE-2026-13424 |
|---|---|
| State | PUBLISHED |
| Assigner | Wordfence |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-08-16 07:16:30 UTC |
| Updated | 2026-08-16 07:16:30 UTC |
| Description | The Online Scheduling and Appointment Booking System – Bookly plugin for WordPress is vulnerable to Stored Cross-Site Scripting via bookly_speed_up_update_addons AJAX action in all versions up to, and including, 27.7 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The injection point is the bookly_speed_up_update_addons AJAX action, which is registered as wp_ajax_nopriv_* and therefore reachable without authentication; the payload is stored verbatim in the bookly_log.details column when a request is submitted without a valid signature, and executes when an administrator later views the Diagnostics → Logs page. |
Risk And Classification
Primary CVSS: v3.1 7.2 HIGH from [email protected]
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Problem Types: CWE-79 | CWE-79 CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Primary | 7.2 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N |
| 3.1 | CNA | DECLARED | 7.2 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
NoneUser Interaction
NoneScope
ChangedConfidentiality
LowIntegrity
LowAvailability
NoneCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Ladela | Online Scheduling And Appointment Booking System Bookly | affected 27.7 semver | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| plugins.trac.wordpress.org/browser/bookly-responsive-appointment-booking-tool/tags/27.7/... | [email protected] | plugins.trac.wordpress.org | |
| www.wordfence.com/threat-intel/vulnerabilities/id/cfb53e44-7f9d-490f-b938-f428c... | [email protected] | www.wordfence.com | |
| plugins.trac.wordpress.org/browser/bookly-responsive-appointment-booking-tool/tags/27.7/... | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/bookly-responsive-appointment-booking-tool/tags/27.7/... | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/changeset | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/bookly-responsive-appointment-booking-tool/tags/27.5/... | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/bookly-responsive-appointment-booking-tool/tags/27.7/... | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/bookly-responsive-appointment-booking-tool/tags/27.5/... | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/bookly-responsive-appointment-booking-tool/tags/27.5/... | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/bookly-responsive-appointment-booking-tool/tags/27.5/... | [email protected] | plugins.trac.wordpress.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: Dmitrii Ignatyev (en)
Additional Advisory Data
| Source | Time | Event |
|---|---|---|
| CNA | 2026-06-26T13:19:37.000Z | Vendor Notified |
| CNA | 2026-08-15T17:53:44.000Z | Disclosed |
There are currently no legacy QID mappings associated with this CVE.