What is CVE-2026-55871?

CVE-2026-55871 is a medium-severity vulnerability in Mayerbalintdev Gym-One, classified under SQL Injection. CVSS score: 6.5/10. Published 2026-10-15.

How severe is CVE-2026-55871?

Medium severity. CVSS v3 base score is 6.5 out of 10.

SQL Injection in Mayerbalintdev Gym-One

CVE-2026-55871

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 class: SQL Injection

Published 2026-10-15 · last modified 2026-10-15.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Mayerbalintdev Gym-One — versions < 1.4.1

Weakness classification (CWE)

CWE-89 — SQL Injection

References

Frequently asked questions

What is CVE-2026-55871?: CVE-2026-55871 is a medium-severity vulnerability in Mayerbalintdev Gym-One, classified under SQL Injection. CVSS score: 6.5/10. Published 2026-10-15.
How severe is CVE-2026-55871?: Medium severity. CVSS v3 base score is 6.5 out of 10.