CVE-2021-36916

Name: CVE-2021-36916
Creator: NVD / NIST
Published: 2021-11-24T17:15:07.857+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 1.80%

Last modified Jun 17, 2026

CVE-2021-36916 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. EPSS estimates a 1.80% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

1.80%

75.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Wpwave	Hide My Wp	<= 6.2.3

References

https://codecanyon.net/item/hide-my-wp-amazing-security-plugin-for-wordpress/4177158Product
https://patchstack.com/database/vulnerability/hide-my-wp/wordpress-hide-my-wp-premium-plugin-6-2-3-sql-injection-sqli-vulnerabilityPatch, Third Party Advisory
https://patchstack.com/hide-my-wp-vulnerabilities-fixed/Exploit, Third Party Advisory
https://codecanyon.net/item/hide-my-wp-amazing-security-plugin-for-wordpress/4177158Product
https://patchstack.com/database/vulnerability/hide-my-wp/wordpress-hide-my-wp-premium-plugin-6-2-3-sql-injection-sqli-vulnerabilityPatch, Third Party Advisory
https://patchstack.com/hide-my-wp-vulnerabilities-fixed/Exploit, Third Party Advisory

Timeline

Published: Nov 24, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-36916?

How severe is CVE-2021-36916?

CVE-2021-36916 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.80% probability of exploitation in the next 30 days.

How do I fix CVE-2021-36916?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-36916?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST