Unauthenticated PHP Object Injection in Esmée Theme by WordPress
CVE-2026-40759

8.1HIGH

Key Information:

Vendor

WordPress
Status
Esmée
Vendor
CVE Published:
16 June 2026

What is CVE-2026-40759?

The Esmée Theme for WordPress, specifically versions up to and including 1.4, is vulnerable to an unauthenticated PHP Object Injection. This vulnerability can be exploited by attackers to inject malicious PHP objects, potentially leading to unauthorized access and manipulation of sensitive data. Users of the Esmée Theme are advised to update to the latest version promptly to ensure their sites are protected from exploitation.

Affected Version(s)

Esmée <= 1.4

References

https://patchstack.com/database/wordpress/theme/esme/vuln...
vdb-entry

CVSS V3.1

Score:
8.1
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Denver Jackson | Patchstack Bug Bounty Program
.