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CVE-2026-55871— GYM One: Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') in admin/users/index.php

Quick assessment

Affected
mayerbalintdev GYM-One
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.

GYM One 是一款面向健身中心、私人教练和体育俱乐部的开源健身房管理软件。在 1.4.1 版本之前，GYM One 的 admin/users/index.php 文件会将 GET 参数 search_name 和 search_email 直接拼接到用户列表查询和用于分页的 COUNT 查询中，且未使用预处理语句（prepared statements）。经过身份验证的管理员可以通过任一搜索字段注入 SQL 语句，从而读取任意表中的数据，包括用户信息和密码哈希值。根据数据库权限的不同，该注入漏洞还可能允许进行

CVSS 6.5 · Medium

Possible ATT&CK Techniques 1 AI

T1059.007 · JavaScript

Affected Version Matrix 1

VendorProduct Version RangeStatus
mayerbalintdev GYM-One < 1.4.1 affected
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I. Basic Information for CVE-2026-55871

Vulnerability Information
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Vulnerability Title
GYM One: Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') in admin/users/index.php
Source: CVE Program / CVE List V5
Vulnerability Description
GYM One is open-source gym management software for fitness centers, personal trainers, and sports clubs. Prior to 1.4.1, GYM One's admin/users/index.php concatenates the search_name and search_email GET parameters into both the user-list query and the COUNT query used for pagination without prepared statements. An authenticated administrator can inject SQL through either search field to read data from arbitrary tables, including user information and password hashes. Depending on database permissions, the same injection may also permit filesystem writes. This issue is fixed in version 1.4.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/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
mayerbalintdev GYM-One < 1.4.1 -

II. Public POCs for CVE-2026-55871

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III. Intelligence Information for CVE-2026-55871

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Other References for CVE-2026-55871 (3)

IV. Related Vulnerabilities

Same product: GYM-One
Same vendor: mayerbalintdev
Same weakness: CWE-89

V. Comments for CVE-2026-55871

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