CVE-2026-59544

CRITICAL 9.8

WordPress Thrive Quiz Builder plugin <= 10.9.3.0 - PHP Object Injection vulnerability

CVSS Score

9.8

EPSS Score

0.0%

EPSS Percentile

0th

Unauthenticated PHP Object Injection in Thrive Quiz Builder <= 10.9.3.0 versions.

CWE	CWE-502
Vendor	thrive themes coupon
Product	thrive quiz builder
Published	Jul 23, 2026
Last Updated	Jul 23, 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

Thrive Themes Coupon / Thrive Quiz Builder

n/a ≤ 10.9.3.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

patchstack.com: https://patchstack.com/database/wordpress/plugin/thrive-quiz-builder/vulnerability/wordpress-thrive-quiz-builder-plugin-10-9-3-0-php-object-injection-vulnerability?_s_id=cve

Credits

VanTastic | Patchstack Bug Bounty Program