CVE-2026-13424 json
Online Scheduling and Appointment Booking System <= 27.7 - Unauthenticated Stored Cross-Site Scripting via bookly_speed_up_update_addons AJAX action
published 2mo ago modified 2mo ago also EUVD-2026-59927
- cvss
- 7.2
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 47%
- public exploits
- 0
- none known
Summary
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.
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Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 2mo ago
Exploit prediction
0.58% chance of exploitation in the next 30 days, higher than 47% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.2 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N |
Affected products
- ladela Online Scheduling and Appointment Booking System – Bookly
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/cfb53e44-7f9d-490f-b938-f428c20219d7?source=cve
- plugins.trac.wordpress.org /browser/bookly-responsive-appointment-booking-tool/tags/27.7/backend/modules/diagnostics/resources/js/diagnos
- plugins.trac.wordpress.org /browser/bookly-responsive-appointment-booking-tool/tags/27.7/lib/PluginsUpdater.php#L97
- plugins.trac.wordpress.org /browser/bookly-responsive-appointment-booking-tool/tags/27.7/lib/PluginsUpdater.php#L13
- plugins.trac.wordpress.org /browser/bookly-responsive-appointment-booking-tool/tags/27.7/backend/modules/diagnostics/Ajax.php#L344
- plugins.trac.wordpress.org /browser/bookly-responsive-appointment-booking-tool/tags/27.5/backend/modules/diagnostics/resources/js/diagnos
- plugins.trac.wordpress.org /browser/bookly-responsive-appointment-booking-tool/tags/27.5/lib/PluginsUpdater.php#L97
- plugins.trac.wordpress.org /browser/bookly-responsive-appointment-booking-tool/tags/27.5/lib/PluginsUpdater.php#L13
- plugins.trac.wordpress.org /browser/bookly-responsive-appointment-booking-tool/tags/27.5/backend/modules/diagnostics/Ajax.php#L344
- plugins.trac.wordpress.org /changeset?reponame=&old=3637918%40bookly-responsive-appointment-booking-tool&new=3637918%40bookly-responsive-
Sources
- CVE List CVE-2026-13424
- NVD CVE-2026-13424
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.