CVE-2026-73364

CRITICAL 9.8

WordPress Flexible Subscriptions plugin <= 1.8.1 - PHP Object Injection vulnerability

CVSS Score

9.8

EPSS Score

0.0%

EPSS Percentile

0th

Customer PHP Object Injection in Flexible Subscriptions <= 1.8.1 versions.

CWE	CWE-502
Vendor	wpdesk
Product	flexible subscriptions
Published	Aug 19, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

wpdesk / Flexible Subscriptions

n/a ≤ 1.8.1

References

NVD ↗ CVE.org ↗ EPSS Data ↗

patchstack.com: https://patchstack.com/database/wordpress/plugin/flexible-subscriptions/vulnerability/wordpress-flexible-subscriptions-plugin-1-8-1-php-object-injection-vulnerability?_s_id=cve

Credits

Van Phuc | Patchstack Bug Bounty Program