CVE-2025-11238: Watu Quiz <= 3.4.4 - Unauthenticated Stored Cross-Site Scripting via HTTP Referer

Severity: high (CVSS 7.2 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-10-25 · updated 2026-10-08
Weakness: CWE-79

Description

The Watu Quiz plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the HTTP Referer header in versions less than, or equal to, 3.4.4 due to insufficient input sanitization and output escaping when the "Save source URL" option is enabled. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever an user accesses an injected page.

Affected products

Bob Watu Quiz: through 3.4.4

References

https://plugins.trac.wordpress.org/changeset/3373855/watu
https://www.wordfence.com/threat-intel/vulnerabilities/id/168e7eac-21ad-43ca-93d1-73c38e12bc29?source=cve

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