Quick answers
- Is CVE-2026-59544 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-59544 being exploited in the wild.
- How severe is CVE-2026-59544?
- Critical severity, with a CVSS score of 9.8, published 23 July 2026.
- Which products and versions are affected?
- Thrive Themes Thrive Quiz Builder <= 10.9.3.0.
- Is there a fix for CVE-2026-59544?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-59544 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-59544?
- Check whether you run Thrive Themes Thrive Quiz Builder at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
The Thrive Quiz Builder plugin for WordPress is vulnerable to PHP Object Injection in versions up to and including 10.9.3.0. This vulnerability arises from the insecure deserialization of user-supplied input (CWE-502), allowing an unauthenticated attacker to inject PHP objects. If a suitable Property-Oriented Programming (POP) chain is present in the environment, an attacker can achieve remote code execution, perform SQL injection, or conduct path traversal. The attack can be executed over the network without any prior authentication or user interaction. The issue is resolved in version 10.9.3.1.
Affected products
- Thrive Themes Thrive Quiz Builder <= 10.9.3.0
Timeline
- 2026-06-27: other: Reported by researcher VanTastic
- 2026-07-22: advisory: Patchstack advisory published
- 2026-07-23: disclosed: CVE published to NVD dataset