WP Booking Calendar <= 10.10 — Unauthenticated Post-Confirmation Booking Manipulation
CVE-2024-13821Published · Updated Action summary
Affected: ≤10.10Update to 10.10.1 or newer
All remediation steps- Severity
- Medium5.3
- CVSS
- 5.3CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:NWhat does this vector mean?
AV:NAttack vector- Network
AC:LAttack complexity- Low
PR:NPrivileges required- None
UI:NUser interaction- None
S:UScope- Unchanged
C:NConfidentiality- None
I:LIntegrity- Low
A:NAvailability- None
- Weakness
- CWE-285 Improper Authorization
- Required access
- No account needed
- Exploit prediction (EPSS)
- No score
- CISA KEV
- Not listed
On this page8
Am I affected?
Booking Calendar booking
- Affected≤ 10.10
- Patched in10.10.1
Update to 10.10.1 or newer.
You are affected if you run ≤ 10.10. Version 10.10.1 and later are not affected by this issue.
- Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Booking Calendar.
- No admin access? Run a passive check of your site. It reads public files only.
- No account is needed to exploit this. Treat any exposed site on an affected version as at risk.
What to do
- Update to version 10.10.1, or a newer patched version
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
- Watch Booking Calendar to get an email when the next vulnerability is published.
Advisory
Source description from Wordfence Intelligence, credited to Asaf Mozes.
The WP Booking Calendar plugin for WordPress is vulnerable to Unauthenticated Post-Confirmation Booking Manipulation in all versions up to, and including, 10.10. This is due to the plugin not properly requiring re-verification after a booking has been made and a change is being attempted. This makes it possible for unauthenticated attackers to manipulate their confirmed bookings, even after they have been approved.
Exploits & references
Proof-of-concept & detection
No public proof-of-concept or detection template is known for this vulnerability.
Advisories & patches
- Advisorywordfence.com
Related CVEs
More in Booking Calendar
All 38| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| Medium5.3 | Unauthenticated Sensitive Information Exposure in 'WPBC_FLEXTIMELINE_NAV' AJAX Action ≤11.4.3Update to 11.5 | CVE-2026-18496 | |
| Low2.7 | 11.8.2 - Authenticated (Editor+) Information Exposure 10.15 – 11.8.2Update to 11.8.3 | CVE-2026-105195 | |
| Medium5.3 | Unauthenticated Information Exposure <11.8Update to 11.8 | CVE-2026-105193 | |
| Medium5.3 | Unauthenticated Duplicate Slot Booking ≤11.8.4Update to 11.9 | CVE-2026-39601 | |
| Medium6.1 | Reflected Cross-Site Scripting via 'wpbc_auto_fill' Parameter ≤11.8.3Update to 11.8.4 | CVE-2026-93655 |
- Medium5.3Unauthenticated Sensitive Information Exposure in 'WPBC_FLEXTIMELINE_NAV' AJAX Action
≤11.4.3Update to 11.5
- Low2.711.8.2 - Authenticated (Editor+) Information Exposure
10.15 – 11.8.2Update to 11.8.3
- Medium5.3Unauthenticated Information Exposure
<11.8Update to 11.8
- Medium5.3Unauthenticated Duplicate Slot Booking
≤11.8.4Update to 11.9
- Medium6.1Reflected Cross-Site Scripting via 'wpbc_auto_fill' Parameter
≤11.8.3Update to 11.8.4
Timeline
CVE published
Severity medium, CVSS 5.3
Record last updated
Sources & licenses
Wordfence record- Vulnerability data
- Wordfence Intelligence. Copyright 2012-2026 Defiant Inc. Licensed under the CC BY-SA 4.0.
- CVE® identifiers
- Copyright 1999-2026 The MITRE Corporation. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
- CVSS / CWE
- National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
- VulnCrest content
- Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.