Is CVE-2026-104403 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-104403 being exploited in the wild.

How severe is CVE-2026-104403?

Medium severity, with a CVSS score of 5.3, published 2 October 2026.

Which products and versions are affected?

ThimPress LearnPress through 4.4.9.

Is there a fix for CVE-2026-104403?

Yes: fixed in 4.4.9.1. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-104403 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-104403?

Check whether you run ThimPress LearnPress at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-104403: ThimPress LearnPress insecure direct object references (IDOR)

CVE-2026-104403 · Severity: medium · CVSS 5.3 · Published 2026-10-02

ThimPress LearnPress is a WordPress plugin that provides learning management system functionality for online courses. An insecure direct object references (IDOR) vulnerability allows unauthenticated attackers to access and view other users' data by manipulating identifiers in the URL. This could expose sensitive course information, student progress, grades, and personal details to unauthorized parties.

Technologies: ThimPress LearnPress. Vendors: ThimPress.

Quick answers

Is CVE-2026-104403 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-104403 being exploited in the wild.
How severe is CVE-2026-104403?: Medium severity, with a CVSS score of 5.3, published 2 October 2026.
Which products and versions are affected?: ThimPress LearnPress through 4.4.9.
Is there a fix for CVE-2026-104403?: Yes: fixed in 4.4.9.1. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-104403 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-104403?: Check whether you run ThimPress LearnPress at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

Fixed in: 4.4.9.1

Technical details

The plugin fails to properly validate access controls on API endpoints or resources when user IDs or object references are directly manipulated in requests. An unauthenticated attacker can enumerate or modify identifiers in URLs to bypass authorization checks and access protected resources belonging to other users or courses. The vulnerability has been fixed in version 4.4.9.1.

Affected products

ThimPress LearnPress through 4.4.9

Timeline

2026-10-02: disclosed

References

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