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CVE-2021-36916: WordPress Hide My WP premium plugin <= 6.2.3 - Unauthenticated SQL injection (SQLi) vulnerability

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.9% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-11-24 · updated 2026-06-17
• Weakness: CWE-89

Description

The SQL injection vulnerability in the Hide My WP WordPress plugin (versions <= 6.2.3) is possible because of how the IP address is retrieved and used inside a SQL query. The function "hmwp_get_user_ip" tries to retrieve the IP address from multiple headers, including IP address headers that the user can spoof, such as "X-Forwarded-For." As a result, the malicious payload supplied in one of these IP address headers will be directly inserted into the SQL query, making SQL injection possible.

Affected products

• wpWave Hide My WP (WordPress plugin): through 6.2.3

References

• https://codecanyon.net/item/hide-my-wp-amazing-security-plugin-for-wordpress/4177158
• https://patchstack.com/database/vulnerability/hide-my-wp/wordpress-hide-my-wp-premium-plugin-6-2-3-sql-injection-sqli-vulnerability
• https://patchstack.com/hide-my-wp-vulnerabilities-fixed/
• https://codecanyon.net/item/hide-my-wp-amazing-security-plugin-for-wordpress/4177158
• https://patchstack.com/database/vulnerability/hide-my-wp/wordpress-hide-my-wp-premium-plugin-6-2-3-sql-injection-sqli-vulnerability
• https://patchstack.com/hide-my-wp-vulnerabilities-fixed/

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