PHP Object Injection Vulnerability in Flexible Subscriptions by WordPress
CVE-2026-73364

9.8CRITICAL

Key Information:

Vendor

WordPress
Status
Flexible Subscriptions
Vendor
CVE Published:
19 August 2026

What is CVE-2026-73364?

A vulnerability has been identified in the Flexible Subscriptions WordPress plugin, allowing for PHP Object Injection in versions 1.8.1 and earlier. This flaw can potentially enable attackers to execute arbitrary code, leading to unauthorized access and manipulation of the system. Users are urged to upgrade to the latest version to mitigate this risk.

Affected Version(s)

Flexible Subscriptions <= 1.8.1

References

https://patchstack.com/database/wordpress/plugin/flexible...
vdb-entry

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Van Phuc | Patchstack Bug Bounty Program
.