CVE-2021-24275: Popup by Supsystic < 1.10.5 - Reflected Cross-Site scripting (XSS)

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 18.2% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2021-05-05 · updated 2026-06-17
Weakness: CWE-79

Description

The Popup by Supsystic WordPress plugin before 1.10.5 did not sanitise the tab parameter of its options page before outputting it in an attribute, leading to a reflected Cross-Site Scripting issue

Affected products

supsystic Popup by Supsystic: before 1.10.5 — fixed in 1.10.5

How to fix

Upgrade to a fixed version: supsystic Popup by Supsystic 1.10.5. Check the vendor advisory for mitigations.

References

http://packetstormsecurity.com/files/164311/WordPress-Popup-1.10.4-Cross-Site-Scripting.html
https://wpscan.com/vulnerability/efdc76e0-c14a-4baf-af70-9d381107308f
http://packetstormsecurity.com/files/164311/WordPress-Popup-1.10.4-Cross-Site-Scripting.html
https://wpscan.com/vulnerability/efdc76e0-c14a-4baf-af70-9d381107308f

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