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CVE-2026-17089— Events Manager <= 7.4.0.1 - Reflected Cross-Site Scripting via 'header_format' Parameter

Quick assessment

Affected
netweblogic Events Manager – Calendar, Bookings, Tickets, and more!
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WordPress 插件 “The Events Manager – Calendar, Bookings, Tickets, and more!” 存在反射型跨站脚本漏洞（Reflected Cross-Site Scripting）。该漏洞存在于所有 7.4.0.1 及以下版本中，原因是插件对 ‘header_format’ 参数缺乏充分的输入清理和输出转义。 攻击者无需身份验证，即可通过诱使用户执行特定操作（例如点击恶意链接），在受影响页面中注入任意 Web 脚本。 虽然插件通过 shortcode 入口使用

CVSS 6.1 · Medium EPSS 0.28% · P20

Possible ATT&CK Techniques 1 AI

T1189 · Drive-by Compromise

Affected Version Matrix 1

VendorProduct Version RangeStatus
netweblogic Events Manager – Calendar, Bookings, Tickets, and more! ≤ 7.4.0.1 affected
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I. Basic Information for CVE-2026-17089

Vulnerability Information
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Vulnerability Title
Events Manager <= 7.4.0.1 - Reflected Cross-Site Scripting via 'header_format' Parameter
Source: CVE Program / CVE List V5
Vulnerability Description
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().
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
netweblogic Events Manager – Calendar, Bookings, Tickets, and more! 0 ~ 7.4.0.1 -

II. Public POCs for CVE-2026-17089

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III. Intelligence Information for CVE-2026-17089

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Security Blog Posts for CVE-2026-17089 (1)

Same Patch Batch · netweblogic · 2026-08-25 · 4 CVEs total

CVE-2026-14280 6.6 MEDIUM Events Manager <= 7.3.7.4 - Authenticated (Administrator+) Local File Inclusion via 'dbem_
CVE-2026-15023 6.5 MEDIUM Events Manager <= 7.4.0 - Authenticated (Contributor+) SQL Injection via 'meta_key' Parame
CVE-2026-10627 5.3 MEDIUM Events Manager <= 7.4.0 - Missing Authorization to Unauthenticated Sensitive Information D

IV. Related Vulnerabilities

Same product: Events Manager – Calendar, Bookings, Tickets, and more!
Same vendor: netweblogic
Same weakness: CWE-79

V. Comments for CVE-2026-17089

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