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CVE-2026-6251— Chaty Pro <= 3.5.5 - Authenticated (Subscriber+) SQL Injection via 'widget_id' Parameter

Quick assessment

Affected
Chaty Chaty Pro
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 Chaty Pro是WordPress基金会的一款客服聊天插件。 WordPress Chaty Pro 3.5.5及之前版本存在SQL注入漏洞，该漏洞源于fetch_custom_field()函数中直接拼接widget_id POST参数到SQL查询，导致容易受到基于时间的盲SQL注入攻击，可能使经过身份验证的攻击者提取数据库敏感内容。

CVSS 6.5 · Medium EPSS 0.41% · P33

Affected Version Matrix 1

VendorProduct Version RangeStatus
Chaty Chaty Pro ≤ 3.5.5 affected
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I. Basic Information for CVE-2026-6251

Vulnerability Information
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Vulnerability Title
Chaty Pro <= 3.5.5 - Authenticated (Subscriber+) SQL Injection via 'widget_id' Parameter
Source: CVE Program / CVE List V5
Vulnerability Description
The Chaty Pro plugin for WordPress is vulnerable to Authenticated Time-Based Blind SQL Injection in versions up to and including 3.5.5. This is due to the fetch_custom_field() function in admin/class-admin-base.php retrieving the widget_id POST parameter via filter_input(INPUT_POST, ...) and directly concatenating the value into a raw SQL query in a numeric context without using $wpdb->prepare() or any integer casting. Additionally, the nonce verification check is performed after the SQL query has already executed, providing no protection against the injection. This makes it possible for authenticated attackers with subscriber-level access and above to inject arbitrary SQL commands, potentially leading to unauthorized extraction of sensitive database contents including user credentials and configuration data.
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
Vulnerability Title
WordPress Chaty Pro SQL注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress Chaty Pro是WordPress基金会的一款客服聊天插件。 WordPress Chaty Pro 3.5.5及之前版本存在SQL注入漏洞，该漏洞源于fetch_custom_field()函数中直接拼接widget_id POST参数到SQL查询，导致容易受到基于时间的盲SQL注入攻击，可能使经过身份验证的攻击者提取数据库敏感内容。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Chaty Chaty Pro 0 ~ 3.5.5 -

II. Public POCs for CVE-2026-6251

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III. Intelligence Information for CVE-2026-6251

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Patches & Fixes for CVE-2026-6251 (2)

News Coverage for CVE-2026-6251 (1)

Other References for CVE-2026-6251 (1)

IV. Related Vulnerabilities

Same product: Chaty Pro
Same weakness: CWE-89

V. Comments for CVE-2026-6251

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