CVE-2025-9850

MEDIUM 6.4

Evenium <= 1.3.11 - Authenticated (Contributor+) Stored Cross-Site Scripting

CVSS Score

6.4

EPSS Score

0.0%

EPSS Percentile

0th

The Evenium plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'evenium_single_event' shortcode in all versions up to, and including, 1.3.11 due to insufficient input sanitization and output escaping on user supplied attributes. 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.

CWE	CWE-79
Vendor	evenium
Product	evenium
Published	Sep 11, 2025
Last Updated	Apr 8, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

evenium / Evenium

0 ≤ 1.3.11

References

NVD ↗ CVE.org ↗ EPSS Data ↗

wordfence.com: https://www.wordfence.com/threat-intel/vulnerabilities/id/394732cc-94b5-4fbf-bd78-da18791724be?source=cve plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/evenium/trunk/src/evenium_quicktags.php#L27

Credits

Peter Thaleikis