WordPress CVEs

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.

Affected WordPress components

• My Calendar – Accessible Event Manager Plugin · my-calendar
  Confirmed match Active
  Up to and including 3.7.3
  View on WordPress.org

A confirmed match is backed by the plugin or theme slug. A possible match is based on the product name only and should be verified.

Affected products and versions

• joedolson My Calendar – Accessible Event Manager — Up to and including 3.7.3

References

• plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/my-calendar/tags/3.7.2/my-calendar-shortcodes.php#L112
• plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/my-calendar/tags/3.7.2/my-calendar-templates.php#L83
• plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/my-calendar/trunk/my-calendar-shortcodes.php#L112
• plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/my-calendar/trunk/my-calendar-templates.php#L83
• plugins.trac.wordpress.org https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&new=3464603%40my-calendar%2Ftrunk&old=3454989%40my-calendar%2Ftrunk&sfp_email=&sfph_mail=#file6
• www.wordfence.com https://www.wordfence.com/threat-intel/vulnerabilities/id/03d5c82e-f82f-4156-bb3e-e6eb365a6c36?source=cve
• nvd.nist.gov Official NVD record