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2 vulnerabilities found for my-calendar by joedolson

CVE-2026-40308 (GCVE-0-2026-40308)

Vulnerability from nvd – Published: 2026-04-16 21:30 – Updated: 2026-04-17 12:32
VLAI?
Title
My Calendar: Unauthenticated Information Disclosure (IDOR) via Multisite switch_to_blog
Summary
My Calendar is a WordPress plugin for managing calendar events. In versions 3.7.6 and below, the mc_ajax_mcjs_action AJAX endpoint, registered for unauthenticated users, passes user-supplied arguments through parse_str() without validation, allowing injection of arbitrary parameters including a site value. On WordPress Multisite installations, this enables an unauthenticated attacker to call switch_to_blog() with an arbitrary site ID and extract calendar events from any sub-site on the network, including private or hidden events. On standard Single Site installations, switch_to_blog() does not exist, causing an uncaught PHP fatal error and crashing the worker thread, creating an unauthenticated denial of service vector. This issue has been fixed in version 3.7.7.
Severity ?
8.8 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
Impacted products
Vendor Product Version
joedolson my-calendar Affected: < 3.7.7
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-40308 (GCVE-0-2026-40308)

Vulnerability from cvelistv5 – Published: 2026-04-16 21:30 – Updated: 2026-04-17 12:32
VLAI?
Title
My Calendar: Unauthenticated Information Disclosure (IDOR) via Multisite switch_to_blog
Summary
My Calendar is a WordPress plugin for managing calendar events. In versions 3.7.6 and below, the mc_ajax_mcjs_action AJAX endpoint, registered for unauthenticated users, passes user-supplied arguments through parse_str() without validation, allowing injection of arbitrary parameters including a site value. On WordPress Multisite installations, this enables an unauthenticated attacker to call switch_to_blog() with an arbitrary site ID and extract calendar events from any sub-site on the network, including private or hidden events. On standard Single Site installations, switch_to_blog() does not exist, causing an uncaught PHP fatal error and crashing the worker thread, creating an unauthenticated denial of service vector. This issue has been fixed in version 3.7.7.
Severity ?
8.8 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
Impacted products
Vendor Product Version
joedolson my-calendar Affected: < 3.7.7
Create a notification for this product.
Show details on NVD website
To clipboard 

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