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CVE-2026-17509— WPML Multilingual CMS <= 4.9.5 - Incorrect Authorization to Authenticated (Subscriber+) SQL Injection via ‘elementIds’

Quick assessment

Affected
WPML WPML Multilingual CMS
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 WPML Multilingual CMS 插件在包括 4.9.5 及之前的所有版本中，由于对用户提供的参数 转义不足，且现有 SQL 查询缺乏充分的预处理（preparation），因而存在基于时间的 SQL 注入漏洞。这使得拥有订阅者（Subscriber）及以上权限的已认证攻击者能够将额外的 SQL 查询附加到现有查询中，从而从数据库中获取敏感信息。该漏洞之所以可被利用，是因为存在授权绕过问题：已注册的授权回调函数未能正确执行，导致无论角色如何，任何已认证用户都能访问管理端的翻译功能。

CVSS 6.5 · Medium

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
WPML WPML Multilingual CMS ≤ 4.9.5 affected
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I. Basic Information for CVE-2026-17509

Vulnerability Information
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Vulnerability Title
WPML Multilingual CMS <= 4.9.5 - Incorrect Authorization to Authenticated (Subscriber+) SQL Injection via ‘elementIds’
Source: CVE Program / CVE List V5
Vulnerability Description
The WPML Multilingual CMS plugin for WordPress is vulnerable to time-based SQL Injection via the ‘elementIds’ parameter in all versions up to, and including, 4.9.5 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 exploitable due to an authorization bypass where the registered authorization callback fails to execute, allowing any authenticated user regardless of role to access administrative translation functionalities.
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
WPML WPML Multilingual CMS 0 ~ 4.9.5 -

II. Public POCs for CVE-2026-17509

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III. Intelligence Information for CVE-2026-17509

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Vendor Advisories for CVE-2026-17509 (1)

Vendor Pages for CVE-2026-17509 (1)

IV. Related Vulnerabilities

Same product: WPML Multilingual CMS
Same vendor: WPML
Same weakness: CWE-89

V. Comments for CVE-2026-17509

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