What is CVE-2026-104403?

CVE-2026-104403 is a medium-severity vulnerability in Thimpress Learnpress, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 5.3/10. Published 2026-10-02.

How severe is CVE-2026-104403?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Auth bypass in Thimpress Learnpress

CVE-2026-104403

Authorization Bypass Through User-Controlled Key vulnerability in ThimPress LearnPress allows Exploiting Incorrectly Configured Access Control Security Levels. This issue affects LearnPress: from n/a through 4.4.9.

Vulnerability class: IDOR (Insecure Direct Object Reference)

Published 2026-10-02 · last modified 2026-10-02.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/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

Thimpress Learnpress

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

patchstack.com/database/wordpress/plugin/learnpress/vulnerability/wordpress-lea… (vdb-entry)

Frequently asked questions

What is CVE-2026-104403?: CVE-2026-104403 is a medium-severity vulnerability in Thimpress Learnpress, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 5.3/10. Published 2026-10-02.
How severe is CVE-2026-104403?: Medium severity. CVSS v3 base score is 5.3 out of 10.