Online Lesson Booking
Online Lesson Booking has 2 disclosed vulnerabilities in the WordSec catalog, all reported in 2019; all 2 are fixed as of September 2026. Their average CVSS score is 7.5, and the most serious one scores 8.8 out of 10. Severity breakdown: 0 critical and 1 high. 2019 was the busiest year with 2 disclosures.
The most common weakness is Cross-Site Request Forgery (CSRF), behind 1 of the records (50%). Other recurring categories include Cross-Site Scripting.
Every one of the 2 issues recorded for Online Lesson Booking has a vendor fix available, so running the current release closes all known holes.
All of these findings were reported by Natsumi Matsuoka. Online Lesson Booking is installed on roughly 500 WordPress sites, so each unpatched flaw has a wide blast radius. The current release is tested up to WordPress 6.9.7.
CVE-2019-5973Online Lesson Booking <= 0.8.6 - Cross-Site Request Forgery
Read the full analysisVulnerability Records
Online Lesson Booking
Author
tnomi
オンラインレッスン予約システム（OLB）は、マンツーマンのオンラインレッスンサイト向けにスケジューラと予約フォームを設置するものです。 講師はスケジューラを使用してタイムテーブルを設定し、会員はタイムテーブルをクリックして予約を行います。 講師と会員には、Eメールにて予約やキャンセルの通知が送られます。 詳しくは、OLBユーザーガイド（日本語）をご覧ください。 Online Lesson Booking system (OLB) was made in order to equip a web site with the reservation-form and scheduler for one-to-one online lesson. Teacher (author) sets up a timetable using a scheduler, and member (subscriber) makes a reservation by clicking timetable. Teacher and a member are informed by e-mail in the case of reservation and cancellation. Visit The User’s Guide (ja)/(en) for more info.
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