CVE-2021-4387

Public Exploit

Description

The Opal Estate plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 1.6.11. This is due to missing or incorrect nonce validation 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 via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.

4.3

CVSS

Severity: Medium

CVSS 3.1 •

EPSS 0.27%

Third-Party Advisory nintechnet.com Third-Party Advisory nintechnet.com Third-Party Advisory nintechnet.com Third-Party Advisory nintechnet.com Third-Party Advisory nintechnet.com Third-Party Advisory nintechnet.com Third-Party Advisory nintechnet.com Third-Party Advisory wordfence.com

Affected: wpopal Opal Estate

References

Link	Tags
https://www.wordfence.com/threat-intel/vulnerabilities/id/2645899c-2b6b-48bd-8f33-2a837a951c5e?source=cve	third party advisory
https://blog.nintechnet.com/25-wordpress-plugins-vulnerable-to-csrf-attacks/	third party advisory
https://blog.nintechnet.com/more-wordpress-plugins-and-themes-vulnerable-to-csrf-attacks/	third party advisory
https://blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-3/	third party advisory
https://blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-2/	third party advisory
https://blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-1/	third party advisory
https://blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-5/	third party advisory exploit
https://blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-4/	third party advisory
https://plugins.trac.wordpress.org/browser/opal-estate/trunk/inc/ajax-functions.php#L177	not applicable

Frequently Asked Questions

What is the severity of CVE-2021-4387?: CVE-2021-4387 has been scored as a medium severity vulnerability.
How to fix CVE-2021-4387?: To fix CVE-2021-4387, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-4387 being actively exploited in the wild?: It is possible that CVE-2021-4387 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-4387?: CVE-2021-4387 affects wpopal Opal Estate.