CVE-2026-73364
Received Received - Intake

Customer PHP Object Injection in Flexible Subscriptions

Publication date: 2026-08-19

Last updated on: 2026-08-19

Assigner: Patchstack

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

CVSS Scores

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Meta Information

Published
2026-08-19
Last Modified
2026-08-19
Generated
2026-08-19
AI Q&A
2026-08-19
EPSS Evaluated
N/A
NVD
CVE-2026-73364
EUVD
EUVD-2026-62384

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
patchstack flexible_subscriptions to 1.8.1 (inc)
wp_media friendly_subscriptions to 1.8.1 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-502 The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.

Attack-Flow Graph

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Executive Summary

This is a PHP Object Injection vulnerability in the WordPress Flexible Subscriptions Plugin versions 1.8.1 and below. It allows attackers to inject malicious PHP objects that can lead to code injection, SQL injection, path traversal, denial of service, and other attacks if a suitable POP chain exists.

Detection Guidance

Detecting this vulnerability requires checking if the Flexible Subscriptions plugin version 1.8.1 or below is installed. Inspect your WordPress plugins directory for the plugin folder and verify the version in the plugin's main file or WordPress admin panel.

Impact Analysis

Attackers could exploit this to take control of your website, steal sensitive data, or disrupt services. The high CVSS score of 9.8 indicates it is highly dangerous and likely to be targeted in mass campaigns.

Compliance Impact

This vulnerability could lead to data breaches, which may violate compliance requirements under GDPR, HIPAA, or other regulations due to unauthorized access to sensitive data.

Mitigation Strategies

Immediately update the Flexible Subscriptions plugin to version 1.8.2 or later. If updating is not possible, apply the mitigation rule provided by Patchstack to block attacks until the update is applied. Contact your hosting provider or developer for assistance if needed.

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