# CVE-2026-102399: Supsystic Photo Gallery unauthenticated CSRF

Source: https://junglewise.ai/threats/cve-2026-102399-unauthenticated-cross-site-request-forgery-csrf-in-photo-gallery  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-30. Updated: 2026-09-30  
License: CC BY 4.0 with a link back

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](https://junglewise.ai/threats/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

- [https://wordpress.org/plugins](https://wordpress.org/plugins)
- [https://patchstack.com/database/wordpress/plugin/gallery-by-supsystic/vulnerability/wordpress-photo-gallery-by-supsystic-plugin-1-21-0-cross-site-request-forgery-csrf-vulnerability?_s_id=cve](https://patchstack.com/database/wordpress/plugin/gallery-by-supsystic/vulnerability/wordpress-photo-gallery-by-supsystic-plugin-1-21-0-cross-site-request-forgery-csrf-vulnerability?_s_id=cve)