CVE-2026-1261: MetForm Pro <= 3.9.6 - Unauthenticated Stored Cross-Site Scripting

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: 2026-03-10 · updated 2026-06-17
Weakness: CWE-79

Description

The MetForm Pro plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the Quiz feature in all versions up to, and including, 3.9.6 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Affected products

WPMet MetForm Pro: through 3.9.6

References

https://plugins.trac.wordpress.org/browser/metform-pro/tags/3.9.5/core/features/quiz/loader.php#L121
https://plugins.trac.wordpress.org/browser/metform-pro/tags/3.9.5/core/features/quiz/loader.php#L69
https://plugins.trac.wordpress.org/browser/metform-pro/tags/3.9.5/core/features/quiz/loader.php#L85
https://wpmet.com/plugin/metform/roadmaps/
https://www.wordfence.com/threat-intel/vulnerabilities/id/e6361ada-f2ba-404e-b9d3-b169da44aa90?source=cve

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