PT-2026-20626 · WordPress · Eventcalendar

Dj + 1 · Published 2026-02-19 · Updated 2026-02-19 · CVE-2026-0556

Positive Technologies (AI Summary)

CVSS v3.1

6.4

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions XO Event Calendar plugin for WordPress versions prior to 3.2.11

Description The software is susceptible to Stored Cross-Site Scripting through the 'xo event field' shortcode. Insufficient input sanitization and output escaping on user-supplied attributes allows authenticated attackers with contributor-level access or higher to inject arbitrary web scripts into pages. These scripts will execute when a user accesses the injected page.

Recommendations Update to version 3.2.11 or later.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-0556

Affected Products

Eventcalendar

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2026-0556 · Security Note
• https://plugins.trac.wordpress.org/browser/xo-event-calendar/tags/3.2.10/inc/main.php?marks=1878-1882#L1878 · Note
• https://wordfence.com/threat-intel/vulnerabilities/id/6bf0eef5-9276-4367-8451-017c509e443d?source=cve · Note
• https://twitter.com/CVEnew/status/2024501289699487785 · Twitter Post
• https://plugins.trac.wordpress.org/browser/xo-event-calendar/tags/3.2.10/inc/main.php?marks=1807-1816#L1807 · Note