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CVE-2026-18752— Persistent Login <= 3.1.0 - Authenticated (Subscriber+) SQL Injection via 'wppl_device_id' Cookie

Quick assessment

Affected
lukeseager Persistent Login
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 Persistent Login 插件存在通用的 SQL 注入漏洞，该漏洞通过 “wppl_device_id” 这一 Cookie 触发。该漏洞存在于所有版本中，包括 3.1.0 及更早版本。其成因是用户提供的参数缺乏足够的转义处理，且现有 SQL 查询未做充分的预编译（preparation）。这使得拥有订阅者（subscriber）权限或更高权限的已认证攻击者，能够向现有查询中追加额外的 SQL 查询语句，从而从数据库中读取敏感信息。该漏洞仅在插件的“登录历史”（Login Histo

CVSS 6.5 · Medium
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I. Basic Information for CVE-2026-18752

Vulnerability Information
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Vulnerability Title
Persistent Login <= 3.1.0 - Authenticated (Subscriber+) SQL Injection via 'wppl_device_id' Cookie
Source: CVE Program / CVE List V5
Vulnerability Description
The Persistent Login plugin for WordPress is vulnerable to generic SQL Injection via 'wppl_device_id' Cookie in all versions up to, and including, 3.1.0 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for authenticated attackers, with subscriber-level access and above, to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database. This vulnerability is only exploitable when the plugin's Login History feature is enabled.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
SQL命令中使用的特殊元素转义处理不恰当(SQL注入)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
lukeseager Persistent Login 0 ~ 3.1.0 -

II. Public POCs for CVE-2026-18752

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III. Intelligence Information for CVE-2026-18752

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Patches & Fixes for CVE-2026-18752 (4)

Vendor Advisories for CVE-2026-18752 (1)

IV. Related Vulnerabilities

Same product: Persistent Login
Same vendor: lukeseager
Same weakness: CWE-89

V. Comments for CVE-2026-18752

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