CVE-2026-2355My Calendar – Accessible Event Manager <= 3.7.3 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode Attributes
Updated under an hour ago ()
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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.
- CVSS
- 6.4 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
- Weakness (CWE)
- CWE-79
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Wordfence
- NVD analysis
- Deferred
- Record last updated
- Apr 8, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
joedolson My Calendar – Accessible Event Manager joedolson:my_calendar_accessible_event_manager (from the name) | through 3.7.3 | CNA record |
References
- https://www.wordfence.com/threat-intel/vulnerabilities/id/03d5c82e-f82f-4156-bb3e-e6eb365a6c36?source=cve
- https://plugins.trac.wordpress.org/browser/my-calendar/tags/3.7.2/my-calendar-shortcodes.php#L112
- https://plugins.trac.wordpress.org/browser/my-calendar/tags/3.7.2/my-calendar-templates.php#L83
- https://plugins.trac.wordpress.org/browser/my-calendar/trunk/my-calendar-templates.php#L83
- https://plugins.trac.wordpress.org/browser/my-calendar/trunk/my-calendar-shortcodes.php#L112
- 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
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.