Event Espresso 4 Decaf <= 4.10.44.decaf — Feature Bypass
CVE-2023-27437Published · Updated Action summary
Affected: ≤4.10.44.decafUpdate to 4.10.45.decaf 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
- Required access
- No account needed
- Exploit prediction (EPSS)
- No score
- CISA KEV
- Not listed
On this page8
Am I affected?
Event Espresso – Event Registration & Ticketing Sales event-espresso-decaf
- Affected≤ 4.10.44.decaf
- Patched in4.10.45.decaf
Update to 4.10.45.decaf or newer.
You are affected if you run ≤ 4.10.44.decaf. Version 4.10.45.decaf and later are not affected by this issue.
- Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Event Espresso – Event Registration & Ticketing Sales.
- 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 4.10.45.decaf, or a newer patched version
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
- Watch Event Espresso – Event Registration & Ticketing Sales to get an email when the next vulnerability is published.
Advisory
Source description from Wordfence Intelligence, credited to yuyudhn.
The Event Espresso 4 Decaf plugin for WordPress is vulnerable to bypass of a plugin feature in versions up to, and including, 4.10.44.decaf. This is due to incorrect validation of the number of tickets ordered per order when making a ticket purchase. This makes it possible for unauthenticated individuals to purchase more tickets than the maximum allowed per order.
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 Event Espresso – Event Registration & Ticketing Sales
All 5| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| Medium6.5 | Missing Authorization to Unauthenticated Settings Change ≤5.0.37.decafUpdate to 5.0.53.decaf | CVE-2025-68007 | |
| Medium4.3 | Cross-Site Request Forgery ≤5.0.28.decafUpdate to 5.0.31.decaf | CVE-2024-56251 | |
| Medium4.3 | Event Espresso 4 Decaf – Event Registration Event Ticketing <= 4.10.46.decaf- Authenticated (Subscriber+) Missing Authorization to Limited Plugin Settings Modification ≤4.10.46.decafUpdate to 5.0.22.decaf | CVE-2024-6883 | |
| Medium4.3 | Cross-Site Request Forgery Bypass ≤4.10.11Update to 4.10.12 | CVE-2021-4404 |
- Medium6.5Missing Authorization to Unauthenticated Settings Change
≤5.0.37.decafUpdate to 5.0.53.decaf
- Medium4.3Cross-Site Request Forgery
≤5.0.28.decafUpdate to 5.0.31.decaf
- Medium4.3Event Espresso 4 Decaf – Event Registration Event Ticketing <= 4.10.46.decaf- Authenticated (Subscriber+) Missing Authorization to Limited Plugin Settings Modification
≤4.10.46.decafUpdate to 5.0.22.decaf
- Medium4.3Cross-Site Request Forgery Bypass
≤4.10.11Update to 4.10.12
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.