CVE-2026-77187
The My Calendar – Accessible Event Manager plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'before' and 'after' Shortcode Attributes in all versions up to, and including, 3.8.3 due to insufficient input sanitization and output escaping. 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.
Açıklama ve Etki
The My Calendar – Accessible Event Manager plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'before' and 'after' Shortcode Attributes in all versions up to, and including, 3.8.3 due to insufficient input sanitization and output escaping. 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.
Referanslar
- https://github.com/joedolson/my-calendar/commit/89bbf7314fac84cdb89e520e8b7b6d69eee8dd3c
- https://plugins.trac.wordpress.org/browser/my-calendar/tags/3.8.0/my-calendar-events.php#L1102
- https://plugins.trac.wordpress.org/browser/my-calendar/tags/3.8.0/my-calendar-shortcodes.php#L358
- https://plugins.trac.wordpress.org/browser/my-calendar/tags/3.8.0/my-calendar.php#L563
- https://www.wordfence.com/threat-intel/vulnerabilities/id/8c8beca2-d02b-4379-99e9-8090ef84ca6d?source=cve
Güvenli Doğrulama Notu
Bu sayfa saldırı gerçekleştiren payload'lar çalıştırmaz. Doğrulama; etkilenen ürün/sürümün envanterden kontrol edilmesi, üretici güvenlik duyurusunun incelenmesi ve güncellemenin uygulanması üzerinden yapılmalıdır.