What is CVE-2026-88826?

CVE-2026-88826 is a high-severity vulnerability in Smugmug Embed, classified under Cross-site Scripting. CVSS score: 8.8/10. Published 2026-10-11.

How severe is CVE-2026-88826?

High severity. CVSS v3 base score is 8.8 out of 10.

XSS in Smugmug Embed

CVE-2026-88826

The SmugMug Embed WordPress plugin through 3.13 does not have authorisation or CSRF checks on an AJAX action that stores gallery data, and does not sanitise or escape that data before outputting it, allowing unauthenticated users to store arbitrary web scripts that execute when an administrator views the SmugMug Embed WordPress plugin through 3.13's settings screen.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2026-10-11 · last modified 2026-10-11.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Smugmug Embed

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

wpscan.com/vulnerability/6e8925b5-85a1-48e3-b744-df1c6fa24ed4/ (technical-description, exploit, vdb-entry)

Frequently asked questions

What is CVE-2026-88826?: CVE-2026-88826 is a high-severity vulnerability in Smugmug Embed, classified under Cross-site Scripting. CVSS score: 8.8/10. Published 2026-10-11.
How severe is CVE-2026-88826?: High severity. CVSS v3 base score is 8.8 out of 10.