What is CVE-2026-27537?

CVE-2026-27537 is a medium-severity vulnerability in Supsystic Popup By, classified under Cross-site Scripting. CVSS score: 6.5/10. Published 2026-08-13.

How severe is CVE-2026-27537?

Medium severity. CVSS v3 base score is 6.5 out of 10.

XSS in Supsystic Popup By

CVE-2026-27537

Unauthenticated Cross Site Scripting (XSS) in Popup by Supsystic <= 1.11.2 versions.

Vulnerability class: XSS (Cross-Site Scripting)

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L.

Affected products

Supsystic Popup By — versions n/a

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

audit@patchstack.com (vdb-entry)

Frequently asked questions

What is CVE-2026-27537?: CVE-2026-27537 is a medium-severity vulnerability in Supsystic Popup By, classified under Cross-site Scripting. CVSS score: 6.5/10. Published 2026-08-13.
How severe is CVE-2026-27537?: Medium severity. CVSS v3 base score is 6.5 out of 10.