My Calendar – Accessible Event Manager <= 3.7.3 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode Attributes
| CVE | CVE-2026-2355 |
|---|---|
| CVSS | 6.4 (Medium) |
| Publicly Published | March 3, 2026 |
| Last Updated | March 4, 2026 |
| Researcher |
Muhammad Yudha - DJ
|
Description
The My Calendar – Accessible Event Manager plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the `template` attribute of the `[my_calendar_upcoming]` shortcode in all versions up to, and including, 3.7.3. This is due to the use of `stripcslashes()` on user-supplied shortcode attribute values in the `mc_draw_template()` function, which decodes C-style hex escape sequences (e.g., `\x3c` to `<`) at render time, bypassing WordPress's `wp_kses_post()` content sanitization that runs at save time. 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.
Learn more about Cross-Site Scripting vulnerabilities and how to prevent them.
References
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
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Vulnerability Details for My Calendar – Accessible Event Manager
| Software Type | Plugin |
|---|---|
| Software Slug | my-calendar (view on wordpress.org) |
| Patched? | Yes |
| Remediation | Update to version 3.7.4, or a newer patched version |
| Affected Version |
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| Patched Version |
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Recent vulnerabilities in My Calendar – Accessible Event Manager
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