What’s Vulnerable › Vulnerabilities

CVE-2026-3600: Investi <= 1.0.26 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'maximum-num-years' Shortcode Attribute

• Severity: medium (CVSS 6.4 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: 2026-04-08 · updated 2026-07-24
• Weakness: CWE-79

Description

The Investi plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'investi-announcements-accordion' shortcode's 'maximum-num-years' attribute in all versions up to, and including, 1.0.26. This is due to insufficient input sanitization and output escaping on user-supplied shortcode attributes. Specifically, the 'maximum-num-years' attribute value is read directly from shortcode attributes and interpolated into a double-quoted HTML attribute without any escaping (no esc_attr(), htmlspecialchars(), or similar). This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Affected products

• Investi: through 1.0.26

References

• https://plugins.trac.wordpress.org/browser/investi/tags/1.0.22/includes/widgets.php#L14
• https://plugins.trac.wordpress.org/browser/investi/tags/1.0.22/includes/widgets.php#L7
• https://plugins.trac.wordpress.org/browser/investi/trunk/includes/widgets.php#L14
• https://plugins.trac.wordpress.org/browser/investi/trunk/includes/widgets.php#L7
• https://plugins.trac.wordpress.org/changeset/3486937/
• https://www.wordfence.com/threat-intel/vulnerabilities/id/51aa0d86-e623-46d1-9d37-a36b4825c071?source=cve

Get alerted when CVE-2026-3600 or the next vulnerability affects your stack