Is CVE-2026-90939 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-90939 being exploited in the wild.

How severe is CVE-2026-90939?

Medium severity, with a CVSS score of 6.5, published 14 September 2026.

Which products and versions are affected?

201206030 Novel-Plus through 5.3.3.

Is there a fix for CVE-2026-90939?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-90939 attacked?

It is attacked over the network, in a web application.

Am I affected by CVE-2026-90939?

Check whether you run 201206030 Novel-Plus 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-2026-90939: novel-plus information disclosure in /sys/user/list endpoint

CVE-2026-90939 · Severity: medium · CVSS 6.5 · Published 2026-09-14

novel-plus is a web-based content management system for managing and distributing novel content. An authenticated user can access an insufficiently protected API endpoint that exposes sensitive data—including password hashes, email addresses, and phone numbers—for other users in the system. Attackers can use this to crack passwords offline and take over accounts.

Technologies: 201206030 Novel-Plus. Vendors: 201206030.

Quick answers

Is CVE-2026-90939 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-90939 being exploited in the wild.
How severe is CVE-2026-90939?: Medium severity, with a CVSS score of 6.5, published 14 September 2026.
Which products and versions are affected?: 201206030 Novel-Plus through 5.3.3.
Is there a fix for CVE-2026-90939?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-90939 attacked?: It is attacked over the network, in a web application.
Am I affected by CVE-2026-90939?: Check whether you run 201206030 Novel-Plus 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.

Technical details

The vulnerability is an information disclosure flaw caused by missing permission annotations on the /sys/user/list REST endpoint in novel-plus. The endpoint requires authentication but does not properly enforce role-based or data-scope restrictions, allowing any authenticated user to retrieve password hashes and personal information (email, phone) for accounts that should be restricted. An attacker with any valid account can call this endpoint to enumerate and extract credentials, which can then be attacked offline using hash-cracking techniques. Patches are available in versions after 5.3.3.

Affected products

201206030 novel-plus through 5.3.3

Timeline

2026-09-14: disclosed

References

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