The Online Scheduling and Appointment Booking System – Bookly plugin for WordPress is vulnerable to price manipulation via the 'tips' parameter in all versions up to, and including, 27.0. This is due to the plugin trusting a user-supplied input without server-side validation against the configured price. This makes it possible for unauthenticated attackers to submit a negative number to the 'tips' parameter, causing the total price to be reduced to zero.
CVE-2026-2519
Score 5.3 from GitHub Security Advisory published 2026-04-09. NVD baseline CVSS 5.3; sources differ by 0.0.
- Lower severity and no public exploit yet
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 5.3
- EG Score
- 5.3(medium)
- EPSS
- 36.8%
- KEV
- Not listed
Published
April 9, 2026
Last Modified
April 24, 2026
References (6)
- security@wordfencehttps://plugins.trac.wordpress.org/browser/bookly-responsive-appointment-booking-tool/trunk/frontend/modules/booking/Ajax.php#L709
- security@wordfencehttps://plugins.trac.wordpress.org/browser/bookly-responsive-appointment-booking-tool/trunk/lib/CartInfo.php#L450
- security@wordfencehttps://plugins.trac.wordpress.org/browser/bookly-responsive-appointment-booking-tool/trunk/lib/UserBookingData.php#L355
- security@wordfencehttps://plugins.trac.wordpress.org/changeset/3480956/
- security@wordfencehttps://www.booking-wp-plugin.com/change-log/
- security@wordfencehttps://www.wordfence.com/threat-intel/vulnerabilities/id/ead87d8b-2659-4e8b-a0b9-138b1db89e36?source=cve
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 13× in last 7d / 45× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
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Frequently asked(5)
What is CVE-2026-2519?
When was CVE-2026-2519 disclosed?
Is CVE-2026-2519 actively exploited?
What is the CVSS score of CVE-2026-2519?
How do I remediate CVE-2026-2519?
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-2519
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