Is CVE-2026-102399 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-102399 being exploited in the wild.

How severe is CVE-2026-102399?

Medium severity, with a CVSS score of 5.4, published 30 September 2026.

Which products and versions are affected?

Supsystic Photo Gallery up to 1.21.0.

Is there a fix for CVE-2026-102399?

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-2026-102399 attacked?

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

Am I affected by CVE-2026-102399?

Check whether you run Supsystic Photo Gallery 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-2026-102399: Supsystic Photo Gallery unauthenticated CSRF

CVE-2026-102399 · Severity: medium · CVSS 5.4 · Published 2026-09-30

Photo Gallery by Supsystic is a WordPress plugin that manages image galleries on websites. An unauthenticated attacker can trick logged-in site administrators into performing unintended actions—such as modifying gallery settings or deleting content—by crafting a malicious webpage and convincing them to visit it. This could lead to unauthorized changes to the site's content or configuration.

Vendors: Supsystic.

Quick answers

Is CVE-2026-102399 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-102399 being exploited in the wild.
How severe is CVE-2026-102399?: Medium severity, with a CVSS score of 5.4, published 30 September 2026.
Which products and versions are affected?: Supsystic Photo Gallery up to 1.21.0.
Is there a fix for CVE-2026-102399?: 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-2026-102399 attacked?: It is attacked over the network, in a web application.
Am I affected by CVE-2026-102399?: Check whether you run Supsystic Photo Gallery 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 a CSRF flaw in Photo Gallery by Supsystic versions up to 1.21.0, where sensitive actions lack proper CSRF token validation. Exploitation requires an unauthenticated attacker to craft a malicious request and trick an authenticated user (such as an admin) into triggering it, bypassing access controls. The issue was patched in version 1.21.1.

Affected products

Supsystic Photo Gallery up to 1.21.0

Timeline

2026-09-30: disclosed

References

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