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CVE-2026-2518— FastX <= 1.0.2 - Missing Authorization to Authenticated (Subscriber+) Limited Plugin Installation and Activation

CVSS 4.3 · Medium EPSS 0.01% · P1

Possible ATT&CK Techniques 1AI

T1505.003 · Web Shell

Affected Version Matrix 1

VendorProductVersion RangeStatus
wpxpoFastX≤ 1.0.2affected
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I. Basic Information for CVE-2026-2518

Vulnerability Information
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Vulnerability Title
FastX <= 1.0.2 - Missing Authorization to Authenticated (Subscriber+) Limited Plugin Installation and Activation
Source: NVD (National Vulnerability Database)
Vulnerability Description
The FastX theme for WordPress is vulnerable to unauthorized limited plugin installation and activation due to missing capability checks on the 'ultp_install_callback' and 'ultp_activate_callback' functions in all versions up to, and including, 1.0.2. This makes it possible for authenticated attackers, with Subscriber-level access and above, to install and activate the PostX plugin.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
授权机制缺失
Source: NVD (National Vulnerability Database)
Vulnerability Title
WordPress plugin FastX theme 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 FastX theme 1.0.2及之前版本存在安全漏洞，该漏洞源于函数 ultp_install_callback 和 ultp_activate_callback 中缺少权限检查，可能导致具有订阅者级别及以上访问
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

VendorProductAffected VersionsCPESubscribe
wpxpoFastX 0 ~ 1.0.2 -

II. Public POCs for CVE-2026-2518

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III. Intelligence Information for CVE-2026-2518

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Patches & Fixes for CVE-2026-2518 (1)

Vendor Advisories for CVE-2026-2518 (1)

Vendor Pages for CVE-2026-2518 (1)

IV. Related Vulnerabilities

Same vendor: wpxpo
Same weakness: CWE-862

V. Comments for CVE-2026-2518

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