What is CVE-2026-73381?

CVE-2026-73381 is a critical-severity vulnerability in Supsystic Popup By, classified under Authentication Bypass Using an Alternate Path or Channel. CVSS score: 9.1/10. Published 2026-08-18.

How severe is CVE-2026-73381?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Vulnerability in Supsystic Popup By

CVE-2026-73381

Unauthenticated Broken Authentication in Popup by Supsystic <= 1.13.0 versions.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H.

Affected products

Supsystic Popup By

Weakness classification (CWE)

CWE-288 — Authentication Bypass Using an Alternate Path or Channel

References

audit@patchstack.com (vdb-entry)

Frequently asked questions

What is CVE-2026-73381?: CVE-2026-73381 is a critical-severity vulnerability in Supsystic Popup By, classified under Authentication Bypass Using an Alternate Path or Channel. CVSS score: 9.1/10. Published 2026-08-18.
How severe is CVE-2026-73381?: Critical severity. CVSS v3 base score is 9.1 out of 10.