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CVE-2026-76780— BeyondSEO <= 1.3.6 - Missing Authorization to Authenticated (Contributor+) Limited Privilege Escalation

Quick assessment

Affected
rankingcoach BeyondSEO – AI SEO to Improve Rankings, Listings & Online Visibility
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 的 Beyondseo 插件在 1.3.6 及更早版本中存在未授权访问漏洞。该漏洞源于插件通过 方法，永久将 （以及同系列的 模块能力）授予“贡献者（Contributor）”角色；而该方法的默认角色列表中包含了“贡献者”。同时，插件的 REST API 端点（通过 、 和 注册）在授权涉及状态变更的请求时，仅调用 方法。该方法仅检查当前用户是否具备 能力，未在回调函数中执行任何管理员权限检查、所有权验证或额外的 nonce（一次性令牌）验证。 因此，拥有“贡献者”及以上权限的已认证攻击者，可将

CVSS 6.3 · Medium
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I. Basic Information for CVE-2026-76780

Vulnerability Information
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Vulnerability Title
BeyondSEO <= 1.3.6 - Missing Authorization to Authenticated (Contributor+) Limited Privilege Escalation
Source: CVE Program / CVE List V5
Vulnerability Description
The Beyondseo plugin for WordPress is vulnerable to unauthorized access in versions up to, and including, 1.3.6. This is due to the plugin permanently granting the 'rankingcoach_write_redirectManager' (and sibling rankingcoach_write_* module capabilities) to the Contributor role via BaseModule::defineCapabilities(), whose default role list includes 'contributor', combined with the module's REST endpoints (registered through BaseSubmoduleApi::registerRouteCreate/registerRouteEdit/registerRouteDelete) authorizing state-changing requests solely through checkPermissionsPost(), which only calls current_user_can('rankingcoach_write_<module>') and performs no admin capability, ownership, or additional nonce check inside the callback. This makes it possible for authenticated attackers, with Contributor-level access and above, to elevate their privileges to effectively that of an Administrator with respect to site-wide redirect management — creating, updating, or deleting 301/302 redirects that RedirectManagerHooks::handleRedirects() executes for every frontend visitor on template_redirect, allowing hijacking of arbitrary paths (including /checkout, /wp-login.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
特权管理不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
rankingcoach BeyondSEO – AI SEO to Improve Rankings, Listings & Online Visibility 0 ~ 1.3.6 -

II. Public POCs for CVE-2026-76780

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III. Intelligence Information for CVE-2026-76780

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Other References for CVE-2026-76780 (7)

IV. Related Vulnerabilities

Same weakness: CWE-269