EventON <= 4.9.12 — Reflected Cross-Site Scripting
CVE-2026-28037Published · Updated Action summary
Affected: ≤4.9.12No patch available
What to do until a fix ships- Severity
- Medium6.1
- CVSS
- 6.1CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:NWhat does this vector mean?
AV:NAttack vector- Network
AC:LAttack complexity- Low
PR:NPrivileges required- None
UI:RUser interaction- Required
S:CScope- Changed
C:LConfidentiality- Low
I:LIntegrity- Low
A:NAvailability- None
- Weakness
- CWE-79 Cross-Site Scripting
- Required access
- No account needed
- Exploit prediction (EPSS)
- No score
- CISA KEV
- Not listed
On this page8
Am I affected?
EventON (Pro) - WordPress Virtual Event Calendar Plugin eventON
- Affected≤ 4.9.12
- PatchedNo fix yet
No patched version available.
You are affected if you run ≤ 4.9.12. No fixed version has been released.
- Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under EventON (Pro) - WordPress Virtual Event Calendar Plugin.
- 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
- No known patch available. Please review the vulnerability's details in depth and employ mitigations based on your organization's risk tolerance. It may be best to uninstall the affected software and find a replacement.
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
- Watch EventON (Pro) - WordPress Virtual Event Calendar Plugin to get an email when the next vulnerability is published.
Advisory
Source description from Wordfence Intelligence, credited to João Pedro Soares de Alcântara.
The EventON plugin for WordPress is vulnerable to Reflected Cross-Site Scripting in versions up to, and including, 4.9.12 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.
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 EventON (Pro) - WordPress Virtual Event Calendar Plugin
All 18| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| Critical9.8 | WordPress Virtual Event Calendar Plugin <= 5.0.11 - Unauthenticated Blind SQL Injection via Search Parameter ≤5.0.11No patch available | CVE-2026-9711 | |
| Medium6.4 | Authenticated (Contributor+) Stored Cross-Site Scripting ≤4.9.12No patch available | CVE-2025-63064 | |
| Medium4.3 | Missing Authorization ≤4.9.9No patch available | CVE-2025-47565 | |
| Medium6.4 | WordPress Virtual Event Calendar Plugin <= 4.9.6 - Missing Authorization to Authenticated (Subscriber+) Stored Cross-Site Scripting ≤4.9.6Update to 4.9.7 | CVE-2025-3527 | |
| Medium5.3 | Missing Authorization ≤4.9.9No patch available | CVE-2025-47564 |
- Critical9.8WordPress Virtual Event Calendar Plugin <= 5.0.11 - Unauthenticated Blind SQL Injection via Search Parameter
≤5.0.11No patch available
- Medium6.4Authenticated (Contributor+) Stored Cross-Site Scripting
≤4.9.12No patch available
- Medium4.3Missing Authorization
≤4.9.9No patch available
- Medium6.4WordPress Virtual Event Calendar Plugin <= 4.9.6 - Missing Authorization to Authenticated (Subscriber+) Stored Cross-Site Scripting
≤4.9.6Update to 4.9.7
- Medium5.3Missing Authorization
≤4.9.9No patch available
Same weakness (Cross-Site Scripting)
All Cross-Site Scripting| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| Medium6.4 | Authenticated (Contributor+) DOM-Based Stored Cross-Site Scripting via 'data-text-sec', 'data-title', and 'title' Attributes via Custom HTML Block | CVE-2026-18742 | |
| High7.1 | Unauthenticated PHP Object Injection to Arbitrary File Deletion via 'comment_content'/'comment_agent' Parameter during Attachment Rename Optimole – Optimize Images | Convert WebP & AVIF | CDN & Lazy Load | Image Optimization≤4.2.19Update to 4.2.20 | CVE-2026-124969 | |
| Critical9.8 | Missing Authorization to Unauthenticated Arbitrary User Password Reset / Account Takeover via Webhook with 'Is the user ID' Field | CVE-2026-126173 | |
| High7.2 | Unauthenticated Stored Cross-Site Scripting via Comment User-Agent Header | CVE-2026-120688 |
- Medium6.4Authenticated (Contributor+) DOM-Based Stored Cross-Site Scripting via 'data-text-sec', 'data-title', and 'title' Attributes via Custom HTML Block
Flatsome
≤3.20.12Update to 3.20.13
- High7.1Unauthenticated PHP Object Injection to Arbitrary File Deletion via 'comment_content'/'comment_agent' Parameter during Attachment Rename
Optimole – Optimize Images | Convert WebP & AVIF | CDN & Lazy Load | Image Optimization
≤4.2.19Update to 4.2.20
- Critical9.8Missing Authorization to Unauthenticated Arbitrary User Password Reset / Account Takeover via Webhook with 'Is the user ID' Field
AutomatorWP Webhooks
≤1.4.4Update to 1.4.5
- 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
Timeline
CVE published
Severity medium, CVSS 6.1
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.