TI-2021-03245 Aliases CVE-2021-4388 GHSA-fc4w-56x3-9r3r

Opal Estate <= 1.6.11 - Missing Authorization

LOW 25CWE-862Published 2023-07-01 · Updated 2026-04-08

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Security bypass
Confidentiality · integrity · availability: None · Low · None
Fix status: No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-862.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.0073 54th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
wpopal	Opal Estate	up to 1.6.11	—	No fix listed	CNA

Opal Estate Vendorwpopal Affected up to 1.6.11 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:wpopal:opal_estate::::::wordpress::*	up to 1.6.11	Vulnerable	wpopal

cpe:2.3:a:wpopal:opal_estate:*:*:*:*:*:wordpress:*:* Versions up to 1.6.11 Vulnerable ·wpopal

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2021-4388
2026-10-03 Alias added: GHSA-fc4w-56x3-9r3r

References

TI-2021-03244 Opal Estate <= 1.6.11 - Cross-Site Request Forgery Bypass CVSS 3.1HIGH 8.8

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences