Cross-site scripting in joedolson My Calendar – Accessible Event Manager
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-2355
- 2026-10-03 Alias added: GHSA-2w6m-q82q-c77g
References
Other 6
- 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
More joedolson vulnerabilities
- TI-2023-05838 SQL injection in my-calendar CVSS 3.1CRITICAL 9.8
- TI-2026-29085 My Calendar: Unauthenticated Information Disclosure (IDOR) via Multisite switch_to_blog CVSS 4.0HIGH 8.8
- TI-2024-01186 My Calendar < 3.4.24 - Authenticated Stored XSS CVSS 3.1MEDIUM 5.4
- TI-2026-75163 Unauthenticated privilege escalation in My Calendar WordPress plugin CVSS 3.1CRITICAL 9.8
- TI-2025-03313 My Tickets – Accessible Event Ticketing <= 2.0.16 - Authenticated (Subscriber+) Privilege Escalation CVSS 3.1HIGH 8.8
- TI-2026-21820 WordPress My Tickets plugin <= 2.1.0 - Sensitive Data Exposure vulnerability CVSS 3.1HIGH 7.5
Sources
- CVE-2026-2355 · CVE Program
- CVE-2026-2355 · NVD
- FIRST EPSS
- GHSA-2w6m-q82q-c77g · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences