CVE-2026-119714
My Calendar 3.8.8 before 3.8.11 Unauthenticated Shortcode Injection via mcs Parameter
CVSS Score
6.5
EPSS Score
0.0%
EPSS Percentile
0th
My Calendar WordPress plugin 3.8.8 before 3.8.11 contains a shortcode injection vulnerability that allows unauthenticated attackers to execute registered shortcodes via the mcs search parameter. The mcs value reaches mc_search_results() in src/my-calendar-search.php without bracket encoding before do_shortcode runs, so a GET request triggers shortcodes on any page or post, enabling content injection and spoofing.
| CWE | CWE-94 |
| Vendor | joedolson |
| Product | my calendar - accessible event manager |
| Published | Oct 30, 2026 |
| Last Updated | Oct 30, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None
Affected Versions
joedolson / My Calendar - Accessible Event Manager
3.8.8 < 3.8.11
References
github.com: https://github.com/joedolson/my-calendar/commit/de875c25d9651abb041b2dfe32f60a4320c66496 github.com: https://github.com/joedolson/my-calendar github.com: https://github.com/joedolson/my-calendar/releases/tag/v3.8.11 github.com: https://github.com/joedolson/my-calendar/blob/v3.8.10/src/my-calendar-search.php#L170 vulncheck.com: https://www.vulncheck.com/advisories/my-calendar-3.8.8-before-3.8.11-unauthenticated-shortcode-injection-via-mcs-parameter
Credits
Andres Poulin Mateos (Drakon Tech Solutions SLU) joedolson