CVE-2023-6555: Email Subscription Popup < 1.2.20 - Reflected XSS

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2024-01-08 · updated 2026-06-17
Weakness: CWE-79

Description

The Email Subscription Popup WordPress plugin before 1.2.20 does not sanitise and escape a parameter before outputting it back in the page, leading to a Reflected Cross-Site Scripting which could be used against high privilege users such as admin

Affected products

nik00726 Email Subscription Popup: before 1.2.20 — fixed in 1.2.20

How to fix

Upgrade to a fixed version: nik00726 Email Subscription Popup 1.2.20. Check the vendor advisory for mitigations.

References

https://wpscan.com/vulnerability/58803934-dbd3-422d-88e7-ebbc5e8c0886
https://wpscan.com/vulnerability/58803934-dbd3-422d-88e7-ebbc5e8c0886

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