Events Manager <= 7.4.0.1 - Reflected Cross-Site Scripting via 'header_format' Parameter
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.
Summary
The Events Manager – Calendar, Bookings, Tickets, and more! plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'header_format' parameter in all versions up to, and including, 7.4.0.1 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. The shortcode entry point sanitizes 'header_format' via wp_kses(), but the unauthenticated 'search_events_grouped' AJAX action bypasses this sanitization entirely, leaving the parameter unsanitized before it is echoed into the HTML body in output_grouped().
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| netweblogic | Events Manager – Calendar, Bookings, Tickets, and more! | up to 7.4.0.1 | — | No fix listed | CNA |
- Events Manager – Calendar, Bookings, Tickets, and more! Vendornetweblogic Affected up to 7.4.0.1 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-17089
- 2026-10-03 Alias added: GHSA-gg76-jx66-hjq8
References
Other 10
- https://www.wordfence.com/threat-intel/vulnerabilities/id/a56d1a9e-7564-41b0-af03-c272ffbbbb97?source=cve
- https://plugins.trac.wordpress.org/browser/events-manager/tags/7.3.4/classes/em-events.php#L469
- https://plugins.trac.wordpress.org/browser/events-manager/tags/7.4.0.1/classes/em-events.php#L469
- https://plugins.trac.wordpress.org/browser/events-manager/tags/7.4.0.1/classes/em-object.php#L1176
- https://plugins.trac.wordpress.org/browser/events-manager/tags/7.4.0.1/em-actions.php#L891
- https://plugins.trac.wordpress.org/browser/events-manager/tags/7.4.0.1/em-actions.php#L920
- https://plugins.trac.wordpress.org/browser/events-manager/tags/7.3.4/classes/em-object.php#L1176
- https://plugins.trac.wordpress.org/browser/events-manager/tags/7.3.4/em-actions.php#L891
- https://plugins.trac.wordpress.org/browser/events-manager/tags/7.3.4/em-actions.php#L920
- https://plugins.trac.wordpress.org/changeset?old_path=/events-manager/tags/7.4.0.1&new_path=/events-manager/tags/7.4.1
More netweblogic vulnerabilities
- TI-2025-06338 Events Manager <= 7.0.3 - Unauthenticated SQL Injection via `orderby` Parameter CVSS 3.1HIGH 7.5
- TI-2024-01647 Meta Tag Manager <= 3.0.2 - Authenticated (Subscriber+) PHP Object Injection CVSS 3.1HIGH 8.8
- TI-2024-10431 SQL injection in netweblogic Events Manager – Calendar, Bookings, Tickets, and more! CVSS 3.1HIGH 7.5
- TI-2026-12084 Events Manager <= 7.3.7.4 - Authenticated (Administrator+) Local File Inclusion via 'dbem_data[updates]' Array Keys CVSS 3.1MEDIUM 6.6
- TI-2013-02368 Cross-site request forgery (CSRF) vulnerability in the Login With Ajax plugin before 3.1… CVSS 2.0MEDIUM 6.8
- TI-2026-09132 Missing authorization in netweblogic Events Manager – Calendar, Bookings, Tickets, and… CVSS 3.1MEDIUM 5.3
Sources
- CVE-2026-17089 · CVE Program
- CVE-2026-17089 · NVD
- FIRST EPSS
- GHSA-gg76-jx66-hjq8 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences