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CVE-2026-12215— OTP Login & Register Woocommerce <= 2.7.2 - Unauthenticated Authentication Bypass via Brute Force

Quick assessment

Affected
xootix OTP Login & Register Woocommerce
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 OTP 登录与注册 WooCommerce 插件存在一个认证绕过漏洞，根源在于 OTP 爆破（Brute Force）问题。该漏洞影响所有版本（包括 2.7.2 及更早版本）。 具体技术细节如下： 1. 速率限制失效： 中的 OTP 尝试计数器仅基于攻击者可控的 Cookie 中的 字段进行键控。攻击者只需轮换该 Cookie，即可无限次重置计数器，从而规避速率限制。 2. OTP 生成算法弱：OTP 使用 PHP 非密码学安全的 函数生成，且默认取值空间仅为 9,000 个可能值（1000

CVSS 5.3 · Medium EPSS 0.32% · P25

Affected Version Matrix 1

VendorProduct Version RangeStatus
xootix OTP Login & Register Woocommerce ≤ 2.7.2 affected
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I. Basic Information for CVE-2026-12215

Vulnerability Information
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Vulnerability Title
OTP Login & Register Woocommerce <= 2.7.2 - Unauthenticated Authentication Bypass via Brute Force
Source: CVE Program / CVE List V5
Vulnerability Description
The OTP Login & Register Woocommerce plugin for WordPress is vulnerable to Authentication Bypass via OTP Brute Force in all versions up to, and including, 2.7.2. The vulnerability exists because the OTP rate-limit attempt counter in `process_otp_form` is keyed exclusively on the attacker-controlled `xoo_ml_user_ip_data` cookie's `ip_address` field, allowing unlimited counter resets by simply rotating the cookie, while the OTP itself is generated with PHP's non-cryptographic `rand()` function over a default space of only 9,000 possible values (1000–9999), and both the OTP issuance endpoint (`xoo_ml_login_with_otp`) and verification endpoint (`xoo_ml_otp_form_submit`) are registered as unauthenticated `wp_ajax_nopriv` actions with no nonce or capability checks. This makes it possible for unauthenticated attackers to brute-force the OTP for any registered account and obtain a full WordPress authentication session — including for administrator accounts — via `wp_set_auth_cookie()` in `login_user_with_otp()`. Exploitation requires the attacker to know the target user's registered phone number, which is used to trigger OTP issuance via the unauthenticated `xoo_ml_login_with_otp` endpoint.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
危险类型文件的不加限制上传
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
xootix OTP Login & Register Woocommerce 0 ~ 2.7.2 -

II. Public POCs for CVE-2026-12215

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III. Intelligence Information for CVE-2026-12215

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Patches & Fixes for CVE-2026-12215 (4)

Proof of Concept for CVE-2026-12215 (1)

Security Blog Posts for CVE-2026-12215 (1)

Vendor Pages for CVE-2026-12215 (1)

IV. Related Vulnerabilities

Same product: OTP Login & Register Woocommerce
Same vendor: xootix
Same weakness: CWE-434

V. Comments for CVE-2026-12215

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