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CVE-2026-1655— EventPrime <= 4.2.8.4 - Missing Authorization to Authenticated (Subscriber+) Arbitrary Event Modification via 'event_id' Parameter

Quick assessment

Affected
metagauss EventPrime – Events Calendar, Bookings and Tickets
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和WordPress plugin都是WordPress基金会的产品。WordPress是一套使用PHP语言开发的博客平台。该平台具有在基于PHP和MySQL的服务器上架设个人博客网站的功能。WordPress plugin是一个应用插件。 WordPress plugin EventPrime 4.2.8.4及之前版本存在安全漏洞，该漏洞源于缺少授权检查，可能导致未经授权的文章修改。

CVSS 4.3 · Medium EPSS 0.29% · P20
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I. Basic Information for CVE-2026-1655

Vulnerability Information
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Vulnerability Title
EventPrime <= 4.2.8.4 - Missing Authorization to Authenticated (Subscriber+) Arbitrary Event Modification via 'event_id' Parameter
Source: CVE Program / CVE List V5
Vulnerability Description
The EventPrime plugin for WordPress is vulnerable to unauthorized post modification due to missing authorization checks in all versions up to, and including, 4.2.8.4. This is due to the save_frontend_event_submission function accepting a user-controlled event_id parameter and updating the corresponding event post without enforcing ownership or capability checks. This makes it possible for authenticated (Customer+) attackers to modify posts created by administrators by manipulating the event_id parameter granted they can obtain a valid nonce.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
WordPress plugin EventPrime 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress和WordPress plugin都是WordPress基金会的产品。WordPress是一套使用PHP语言开发的博客平台。该平台具有在基于PHP和MySQL的服务器上架设个人博客网站的功能。WordPress plugin是一个应用插件。 WordPress plugin EventPrime 4.2.8.4及之前版本存在安全漏洞，该漏洞源于缺少授权检查，可能导致未经授权的文章修改。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
metagauss EventPrime – Events Calendar, Bookings and Tickets * ~ 4.2.8.4 -

II. Public POCs for CVE-2026-1655

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III. Intelligence Information for CVE-2026-1655

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Patches & Fixes for CVE-2026-1655 (4)

IV. Related Vulnerabilities

Same product: EventPrime – Events Calendar, Bookings and Tickets
Same vendor: metagauss
Same weakness: CWE-862

V. Comments for CVE-2026-1655

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