HOME VULNERABILITIESCVE-2021-36916

CRITICAL

CVE-2021-36916

CWE-89Published: November 24, 2021· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official 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.

Technical Analysis

CVE-2021-36916 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

From a weakness classification perspective (CWE-89): SQL injection vulnerabilities allow attackers to manipulate database queries, potentially exposing or modifying sensitive data.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.None

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Affected Vendors & Products

wpwave1 product(s)

hide my wp

Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time

Offensive Security exploit database

GitHub PoC Search

Community PoC repositories

Rapid7 / Metasploit

Metasploit module search

Security advisories & exploits

Official NIST entry

CVE Program entry

External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://patchstack.com/database/vulnerability/hide-my-wp/wordpress-hide-my-wp-premium-plugin-6-2-3-sql-injection-sqli-vulnerability

PATCHhttps://patchstack.com/database/vulnerability/hide-my-wp/wordpress-hide-my-wp-premium-plugin-6-2-3-sql-injection-sqli-vulnerability

ADVISORYhttps://patchstack.com/hide-my-wp-vulnerabilities-fixed/

ADVISORYhttps://patchstack.com/hide-my-wp-vulnerabilities-fixed/

All References (6)

→

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

Quick Facts

CVE IDCVE-2021-36916

CVSS Score9.8 / 10

SeverityCRITICAL

WeaknessCWE-89

CISA KEVNo

Affected1 vendor(s)

PublishedNov 24, 2021

Related CVEs (CWE-89)

Recommended Actions

→Apply vendor patches immediately
→Monitor CVE-2021-36916 in threat intel feeds
→Review IDS/IPS signatures for exploitation attempts

Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.

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