Photo Gallery by Supsystic: Cross-site scripting

Photo Gallery by Supsystic is affected by cross-site scripting. Exploitation requires an authenticated administrator account. Injected script can execute in the affected site's origin when the vulnerable output is viewed. The published affected range is n/a through 1.16.3.

CVE / CNA score 5.9 CVSS 3.1 · audit@patchstack.com

NVD score Pending NVD has not published its own CVSS assessment.

Component: Photo Gallery by Supsystic
Plugin slug: gallery-by-supsystic
Affected: n/a through 1.16.3
Safe version: See mitigation notes
Published: Jul 23, 2026
Weakness: CWE-79 — Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

This CVE was published Jul 23, 2026 and is one of 4 known issues for this plugin.

What to do

Update, patch or deactivate.

No fixed release is identified. Update Photo Gallery by Supsystic when a release after 1.16.3 becomes available; until then, disable and remove it when the site's risk warrants. The official upstream changelog lists version 1.18.1, which is newer than the published affected range. Its changelog does not clearly confirm this specific fix, so it is not counted as a known-safe release.

No confirmed safe version is listed. Consider a vendor-supported patch or temporarily restricting the affected functionality while you assess the risk.

Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.

Source record

Technical description

Administrator Cross Site Scripting (XSS) in Photo Gallery by Supsystic <= 1.16.3 versions.

CVE / CNA vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:L

References

Primary and upstream sources

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