Unauthenticated Cross Site Scripting Vulnerability in Popup Plugin by Supsystic
CVE-2026-27537

6.5MEDIUM

Key Information:

Vendor

WordPress
Status
Popup By Supsystic
Vendor
CVE Published:
13 August 2026

What is CVE-2026-27537?

The Popup by Supsystic WordPress plugin is vulnerable to unauthenticated Cross Site Scripting (XSS), which allows attackers to inject malicious scripts into web pages. This can lead to session hijacking, defacement, and other attacks on users interacting with compromised popups. Proper validation of user inputs is critical to mitigate this vulnerability in versions up to 1.11.2.

Affected Version(s)

Popup by Supsystic <= 1.11.2

References

https://patchstack.com/database/wordpress/plugin/popup-by...
vdb-entry

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
Required
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

hhhai | Patchstack Bug Bounty Program
.