What is CVE-2026-109963?

CVE-2026-109963 is a medium-severity vulnerability in Froxlor, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 4.3/10. Published 2026-10-13.

How severe is CVE-2026-109963?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Auth bypass in Froxlor

CVE-2026-109963

Froxlor before 2.3.14 contains an insecure direct object reference vulnerability in the email template editor (admin_templates.php) because the mail body is fetched by mailbodyid without an adminid ownership check. Authenticated reseller admins can pair their own subjectid with sequential foreign mailbodyid values in edit requests to read other admins' email templates, including the full administrator's.

Vulnerability class: IDOR (Insecure Direct Object Reference)

Published 2026-10-13 · last modified 2026-10-13.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/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

Froxlor

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

github.com/froxlor/froxlor/security/advisories/GHSA-646m-cj89-hm32 (vendor-advisory)
www.vulncheck.com/advisories/froxlor-before-2.3.14-idor-in-email-template-edito… (third-party-advisory)

Frequently asked questions

What is CVE-2026-109963?: CVE-2026-109963 is a medium-severity vulnerability in Froxlor, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 4.3/10. Published 2026-10-13.
How severe is CVE-2026-109963?: Medium severity. CVSS v3 base score is 4.3 out of 10.