Vulnerability · Published Jul 23, 2026 · Assigned by Patchstack
CVE-2026-59544WordPress Thrive Quiz Builder plugin <= 10.9.3.0 - PHP Object Injection vulnerability
Critical 9.8
In plain English
A critical-severity unsafe deserialization in Thrive Quiz Builder from Thrive Themes Coupon. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 47% of all known vulnerabilities).
Severity (CVSS 3.1)9.8Critical
Exploit odds (30 days)0.6%top 53.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Unauthenticated PHP Object Injection in Thrive Quiz Builder <= 10.9.3.0 versions.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Thrive Themes Coupon | Thrive Quiz Builder | n/a – through 10.9.3.0 |
Weakness: CWE-502 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H