CVE-2021-4388 - CVE House

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Status published Medium CVE-2021-4388

Opal Estate <= 1.6.11 - Missing Authorization

4.3 CVSS

Vulnerability Description

The Opal Estate plugin for WordPress is vulnerable to featured property modifications in versions up to, and including, 1.6.11. This is due to missing capability checks on the opalestate_set_feature_property() and opalestate_remove_feature_property() functions. This makes it possible for unauthenticated attackers to set and remove featured properties.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

Jerome Bruandet

References

More from wpopal

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WordPress Opal Portfolio Plugin <= 1.0.4 - Stored Cross Site Scripting (XSS) vulnerability

WordPress GG Bought Together for WooCommerce plugin <= 1.0.2 - SQL Injection Vulnerability

Affected Vendor

wpopal

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Affected Software

Opal Estate

Vulnerable Versions:

0

Timeline

Official Publish: July 1st, 2023

Last Modified: April 8th, 2026

Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Weaknesses (CWE)

MITRE ATT&CK TTPs

T1190 Exploit Public-Facing Application

T1068 Exploitation for Privilege Escalation

Privilege Escalation

T1078 Valid Accounts

T1531 Account Access Removal