BookIt <= 2.3.7 — Authentication Bypass
CVE-2023-2834Published · Updated Action summary
Affected: ≤2.3.7Update to 2.3.8 or newer
All remediation steps- Severity
- Critical9.8
- CVSS
- 9.8CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HWhat does this vector mean?
AV:NAttack vector- Network
AC:LAttack complexity- Low
PR:NPrivileges required- None
UI:NUser interaction- None
S:UScope- Unchanged
C:HConfidentiality- High
I:HIntegrity- High
A:HAvailability- High
- Required access
- No account needed
- Exploit prediction (EPSS)
- No score
- CISA KEV
- Not listed
On this page8
Am I affected?
Bookit — Booking & Appointment Calendar bookit
- Affected≤ 2.3.7
- Patched in2.3.8
Update to 2.3.8 or newer.
You are affected if you run ≤ 2.3.7. Version 2.3.8 and later are not affected by this issue.
- Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Bookit — Booking & Appointment 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 2.3.8, or a newer patched version
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
- Watch Bookit — Booking & Appointment Calendar to get an email when the next vulnerability is published.
Advisory
Source description from Wordfence Intelligence, credited to István Márton.
The BookIt plugin for WordPress is vulnerable to authentication bypass in versions up to, and including, 2.3.7. This is due to insufficient verification on the user being supplied during booking an appointment through the plugin. This makes it possible for unauthenticated attackers to log in as any existing user on the site, such as an administrator, if they have access to the email.
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 Bookit — Booking & Appointment Calendar
All 15| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| Medium4.3 | Missing Authorization ≤2.6.0.6Update to 2.6.0.7 | CVE-2026-62019 | |
| High7.5 | Unauthenticated SQL Injection ≤2.6.0.6Update to 2.6.0.7 | CVE-2026-62048 | |
| Medium5.3 | Missing Authorization ≤2.6.0.5Update to 2.6.0.6 | CVE-2026-110900 | |
| Medium4.3 | Missing Authorization ≤2.6.0.4Update to 2.6.0.5 | CVE-2026-89007 | |
| Medium4.3 | Authenticated (Bookit Staff+) Information Exposure ≤2.6.0.4Update to 2.6.0.5 | CVE-2026-89008 |
- Medium4.3Missing Authorization
≤2.6.0.6Update to 2.6.0.7
- High7.5Unauthenticated SQL Injection
≤2.6.0.6Update to 2.6.0.7
- Medium5.3Missing Authorization
≤2.6.0.5Update to 2.6.0.6
- Medium4.3Missing Authorization
≤2.6.0.4Update to 2.6.0.5
- Medium4.3Authenticated (Bookit Staff+) Information Exposure
≤2.6.0.4Update to 2.6.0.5
Timeline
CVE published
Severity critical, CVSS 9.8
Record last updated
Sources & licenses
Wordfence record- Vulnerability data
- Wordfence Intelligence. [object Object] Licensed under the CC BY-SA 4.0.
- CVE® identifiers
- [object Object]. 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.