Answer in brief
CVE-2026-13424 records a Unknown severity vulnerability in Online Scheduling and Appointment Booking System <= 27.7 - Unauthenticated Stored Cross-Site Scripting via bookly_speed_up_update_addons AJAX action. The current sources do not mark it as known exploited. The current feed maps ladela/Online Scheduling and Appointment Booking System – Bookly (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
Answer in brief
CVE-2026-13424 records a Unknown severity vulnerability in Online Scheduling and Appointment Booking System <= 27.7 - Unauthenticated Stored Cross-Site Scripting via bookly_speed_up_update_addons AJAX action. The current sources do not mark it as known exploited. The current feed maps ladela/Online Scheduling and Appointment Booking System – Bookly (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps ladela/Online Scheduling and Appointment Booking System – Bookly (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| ladela/Online Scheduling and Appointment Booking System – Booklygeneric | 0 | Not reported |
Published upstream
Aug 16, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 16, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 16, 2026
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.
Quoted source text, attributed separately from HOL analysis.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps ladela/Online Scheduling and Appointment Booking System – Bookly (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| ladela/Online Scheduling and Appointment Booking System – Booklygeneric | 0 | Not reported |
Published upstream
Aug 16, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 16, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 16, 2026
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.
Quoted source text, attributed separately from HOL analysis.