CVE-2022-4541: WordPress Visitors <= 1.0 - Unauthenticated Stored Cross-Site Scripting via HTTP Header

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-09-26 · updated 2026-06-17
Weakness: CWE-79

Description

The WordPress Visitors plugin for WordPress is vulnerable to Stored Cross-Site Scripting via a spoofed HTTP Header value in versions up to, and including, 1.0 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses the nm_vistior page.

Affected products

nitinmaurya12 WordPress Visitors: through 1.0

References

https://plugins.trac.wordpress.org/browser/nm-visitors/trunk/nm-visitors.php#L105
https://plugins.trac.wordpress.org/browser/nm-visitors/trunk/nm-visitors.php#L63
https://www.wordfence.com/threat-intel/vulnerabilities/id/fa15c0a4-c99d-40c9-a654-f3a910460502?source=cve

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