CVE-2026-55871

MediumCVSS 6.5

Published: 15/10/2026(UTC)Updated: 15/10/2026(UTC)Translated: 16/10/2026(UTC)NVD NIST

Exploitation Probability (EPSS)

Low risk

0.34%

26th percentile - higher than 26% of all known CVEs

Summary

GYM One is open-source gym management software. Prior to 1.4.1, 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.

Risk Assessment

An attacker with administrator privileges can read sensitive data, including password hashes, and potentially write files on the server. This could lead to full system compromise.

Recommendation

Update GYM One to version 1.4.1 or later, which fixes this vulnerability.

Other vulnerabilities in GYM One

CVE-2026-55872High
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 renders the stored firstname, lastname, and email profile fields into the administrator user list without HTML output encoding. An attacker who can store values in those fields can cause content to execute in an administrator's browser when the administrator visits /admin/users/. The persistent script can access administrator-session data or perform actions with the administrator's privileges until the stored record is removed. This issue is fixed in version 1.4.1.

Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS