Eventin <= 4.1.17 — Missing Authorization to Authenticated (Subscriber+) Notification Flow Management via notification-flow REST API Endpoint
CVE-2026-11821Published · Updated Action summary
Affected: ≤4.1.17Update to 4.1.18 or newer
All remediation steps- Severity
- Medium5.4
- CVSS
- 5.4CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:NWhat does this vector mean?
AV:NAttack vector- Network
AC:LAttack complexity- Low
PR:LPrivileges required- Low
UI:NUser interaction- None
S:UScope- Unchanged
C:LConfidentiality- Low
I:LIntegrity- Low
A:NAvailability- None
- Weakness
- CWE-862 Missing Authorization
- Required access
- Unknown
- Exploit prediction (EPSS)
- 0.3% chance in 30 days26th percentile
- CISA KEV
- Not listed
On this page8
Am I affected?
Eventin – Events Calendar, Tickets, Registration, Booking & WooCommerce wp-event-solution
- Affected≤ 4.1.17
- Patched in4.1.18
Update to 4.1.18 or newer.
You are affected if you run ≤ 4.1.17. Version 4.1.18 and later are not affected by this issue.
- Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Eventin – Events Calendar, Tickets, Registration, Booking & WooCommerce.
- No admin access? Run a passive check of your site. It reads public files only.
What to do
- Update to version 4.1.18, or a newer patched version
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
- Watch Eventin – Events Calendar, Tickets, Registration, Booking & WooCommerce to get an email when the next vulnerability is published.
Advisory
Source description from Wordfence Intelligence, credited to Sushi Com Abacate.
The Eventin – Event Calendar, Event Registration, Tickets & Booking (AI Powered) plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 4.1.17. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with subscriber-level access and above, to view, create, update, clone, and delete notification flow event automation workflows that should be restricted to administrators.
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 Eventin – Events Calendar, Tickets, Registration, Booking & WooCommerce
All 59| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| Medium6.5 | Missing Authorization to Authenticated (Subscriber+) Sensitive Information Exposure via 'id' Parameter ≤4.1.29Update to 4.1.30 | CVE-2026-109994 | |
| High7.2 | Unauthenticated Stored Cross-Site Scripting ≤4.1.26Update to 4.1.27 | CVE-2026-112844 | |
| Medium5.3 | Missing Authorization ≤4.1.26Update to 4.1.27 | CVE-2026-110380 | |
| Medium5.3 | Missing Authorization ≤4.1.25Update to 4.1.26 | CVE-2026-109898 | |
| Medium5.3 | Missing Authorization ≤4.1.25Update to 4.1.26 | CVE-2026-97300 |
- Medium6.5Missing Authorization to Authenticated (Subscriber+) Sensitive Information Exposure via 'id' Parameter
≤4.1.29Update to 4.1.30
- High7.2Unauthenticated Stored Cross-Site Scripting
≤4.1.26Update to 4.1.27
- Medium5.3Missing Authorization
≤4.1.26Update to 4.1.27
- Medium5.3Missing Authorization
≤4.1.25Update to 4.1.26
- Medium5.3Missing Authorization
≤4.1.25Update to 4.1.26
Same weakness (Missing Authorization)
All Missing Authorization| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| High7.2 | Unauthenticated Stored Cross-Site Scripting via Comment User-Agent Header | CVE-2026-120688 | |
| Critical9.8 | Unauthenticated Arbitrary File Upload via File Upload via Public Form Submission | CVE-2026-125055 | |
| Critical9.8 | Unauthenticated PHP Object Injection to Remote Code Execution via 'form' Parameter | CVE-2026-119077 | |
| Medium5.3 | Unauthenticated Sensitive Information Exposure in 'search' Parameter | CVE-2026-121518 |
- High7.2Unauthenticated Stored Cross-Site Scripting via Comment User-Agent Header
EZ SQL Reports Shortcode Widget and DB Backup
≤5.25.25Update to 5.26.45
- Critical9.8Unauthenticated Arbitrary File Upload via File Upload via Public Form Submission
Chatterbug Forms – Fast, Flexible WordPress Form Builder
≤1.0.2Update to 1.1
- Critical9.8Unauthenticated PHP Object Injection to Remote Code Execution via 'form' Parameter
ELEX WordPress HelpDesk & Customer Ticketing System
≤3.3.9Update to 3.4.0
- Medium5.3Unauthenticated Sensitive Information Exposure in 'search' Parameter
Customer Reviews for WooCommerce
≤5.127.0Update to 5.128.0
Timeline
CVE published
Severity medium, CVSS 5.4
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.
- EPSS
- Exploit Prediction Scoring System by FIRST.org.
- VulnCrest content
- Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.