Unauthenticated PHP Object Injection Vulnerability in Léonie Theme by WordPress
CVE-2026-40758

8.1HIGH

Key Information:

Vendor

WordPress
Status
Léonie
Vendor
CVE Published:
16 June 2026

What is CVE-2026-40758?

The Léonie WordPress theme, specifically in versions up to 1.2.1, is susceptible to an unauthenticated PHP Object Injection vulnerability. This flaw allows unauthorized users to exploit the theme, potentially leading to arbitrary code execution and compromising the integrity of the website. It is essential for users of the Léonie theme to apply all patches and updates to secure their WordPress installations against this threat.

Affected Version(s)

Léonie <= 1.2.1

References

https://patchstack.com/database/wordpress/theme/lonie/vul...
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
.