What is CVE-2026-102373?

CVE-2026-102373 is a medium-severity vulnerability in Gestsup, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 6.5/10. Published 2026-09-29.

How severe is CVE-2026-102373?

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

Auth bypass in Gestsup

CVE-2026-102373

GestSup versions before 3.2.62 fail to validate ticket ownership when loading comments via the threadedit parameter in thread.php. Authenticated attackers can enumerate sequential comment IDs to read private comments from other users' tickets without proper authorization checks.

Vulnerability class: IDOR (Insecure Direct Object Reference)

Published 2026-09-29.

CVSS v3 metric

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

Gestsup

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

gestsup.fr/index.php (release-notes)
gestsup.fr/index.php (product)
gestsup.fr/index.php (patch)
www.vulncheck.com/advisories/gestsup-before-3.2.62-private-ticket-comment-discl… (third-party-advisory)

Frequently asked questions

What is CVE-2026-102373?: CVE-2026-102373 is a medium-severity vulnerability in Gestsup, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 6.5/10. Published 2026-09-29.
How severe is CVE-2026-102373?: Medium severity. CVSS v3 base score is 6.5 out of 10.