CVE-2026-77203— Groups <= 4.6.0 已认证用户权限提升漏洞
一分钟漏洞结论
影响对象
itthinx Groups – Memberships and Access Control
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
WordPress 插件 “Groups – Memberships and Access Control” 存在权限提升漏洞，影响所有 4.6.0 及更早版本。该漏洞源于 函数在判断用户是否有资格加入某个组时，错误地依赖于当前页面的全局 （即该文章的作者）的权限，而非当前已认证用户的自身权限。同时，该函数在同一响应中向调用者颁发并返回一个有效的 “groups-join-data” 哈希值和 WordPress Nonce，从而彻底绕过了所有授权检查机制，使攻击者能够自行加入任意组别。 利用此漏洞，具备 Subs
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一、 漏洞 CVE-2026-77203 基础信息
漏洞信息
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Vulnerability Title
Groups <= 4.6.0 - Authenticated (Subscriber+) Privilege Escalation via 'groups_join' Shortcode
来源: CVE Program / CVE List V5
Vulnerability Description
The Groups – Memberships and Access Control plugin for WordPress is vulnerable to Privilege Escalation in all versions up to, and including, 4.6.0. This is due to the groups_join() function deriving group-join eligibility from the ambient post's author capabilities via the global $post->post_author rather than from the currently authenticated user's own capabilities, while simultaneously minting and returning a valid groups-join-data hash and WordPress nonce for the caller in the same response — eliminating all authorization barriers to self-enrollment. This makes it possible for authenticated attackers, with Subscriber-level access and above, to enroll themselves into any group including privileged groups carrying the groups_admin_groups capability, and to subsequently create and join a group containing every registered WordPress capability, effectively escalating their privileges to Administrator. Exploitation requires the attacker to supply an Administrator-authored post ID via the post_ID parameter of the authenticated wp_ajax_parse_media_shortcode handler in order to establish the privileged ambient post context used by the flawed authorization check.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
来源: CVE Program / CVE List V5
Vulnerability Type
特权管理不恰当
来源: CVE Program / CVE List V5
受影响产品
| 厂商 | 产品 | 影响版本 | CPE | 订阅 |
|---|---|---|---|---|
| itthinx | Groups – Memberships and Access Control | 0 ~ 4.6.0 | - |
|
二、漏洞 CVE-2026-77203 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-77203 新闻报道 (1)
CVE-2026-77203 其他参考 (6)
IV. Related Vulnerabilities
V. Comments for CVE-2026-77203
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