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CVE-2026-119980— UsersWP <= 1.2.78 - Unauthenticated Account Access via Predictable Dummy User Password Disclosed through Registration Form Hash

Quick assessment

Affected
stiofansisland UsersWP – Front-end login form, User Registration, User Profile & Members Directory plugin for WP
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 UsersWP（提供前端登录表单、用户注册、用户资料及会员目录功能）在所有 1.2.78 及以下版本中存在因“使用可预测密码”而导致未授权账户访问的漏洞。 该漏洞的成因在于： 函数为插件内置的 25 个虚拟用户账户生成共享密码时，仅取 哈希值的前 15 个字符；然而，该哈希值的完整 25 个字符却同时被嵌入到每个注册表单响应中的隐藏字段 内。该字段可通过无需认证的公开 页面，或通过 AJAX 处理器访问，即便网站已禁用用户注册功能，攻击者仍可访问。 因此，未认证的攻击者仅需发起一次 HTT

CVSS 6.5 · Medium
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I. Basic Information for CVE-2026-119980

Vulnerability Information
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Vulnerability Title
UsersWP <= 1.2.78 - Unauthenticated Account Access via Predictable Dummy User Password Disclosed through Registration Form Hash
Source: CVE Program / CVE List V5
Vulnerability Description
The UsersWP – Front-end login form, User Registration, User Profile & Members Directory plugin for WordPress is vulnerable to unauthorized account access via Use of Predictable Password in all versions up to, and including, 1.2.78 The vulnerability exists because `get_dummy_user_passowrd()` derives the shared password for all 25 built-in dummy user accounts as the first 15 characters of `substr(hash('SHA256', AUTH_KEY . site_url()), 0, 25)`, while the full 25-character value of that same hash is simultaneously embedded in the hidden `uwp_register_hash` field rendered on every registration form response — reachable without authentication via both the public `/register/` page and the `wp_ajax_nopriv_uwp_ajax_register_form` AJAX handler, even when user registration is disabled. This makes it possible for unauthenticated attackers to recover the dummy user password directly from a single HTTP request and use it to authenticate as any of the 25 built-in dummy accounts (such as antawn, chynna, or kiki) through `wp-login.php`, potentially achieving privilege escalation if any dummy account holds an elevated role. Exploitation requires that an administrator has previously created dummy users via the plugin's Tools page.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
认证机制不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
stiofansisland UsersWP – Front-end login form, User Registration, User Profile & Members Directory plugin for WP 0 ~ 1.2.78 -

II. Public POCs for CVE-2026-119980

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III. Intelligence Information for CVE-2026-119980

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Other References for CVE-2026-119980 (7)

IV. Related Vulnerabilities

Same product: UsersWP – Front-end login form, User Registration, User Profile & Members Directory plugin for WP
Same vendor: stiofansisland
Same weakness: CWE-287