What’s Vulnerable › Vulnerabilities

CVE-2021-38321: Custom Menu Plugin <= 1.3.3 Reflected Cross-Site Scripting

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-09-09 · updated 2026-06-17
• Weakness: CWE-79

Description

The Custom Menu Plugin WordPress plugin is vulnerable to Reflected Cross-Site Scripting via the selected_menu parameter found in the ~/custom-menus.php file which allows attackers to inject arbitrary web scripts, in versions up to and including 1.3.3.

Affected products

• Custom Menu Plugin: through 1.3.3

References

• https://plugins.trac.wordpress.org/browser/custom-sub-menus/trunk/custom-menus.php?rev=2205549#L136
• https://www.wordfence.com/vulnerability-advisories/#CVE-2021-38321
• https://plugins.trac.wordpress.org/browser/custom-sub-menus/trunk/custom-menus.php?rev=2205549#L136
• https://www.wordfence.com/vulnerability-advisories/#CVE-2021-38321

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