CVE-2026-119714

Description

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.

References

https://www.vulncheck.com/advisories/my-calendar-3.8.8-before-3.8.11-unauthenticated-shortcode-injection-via-mcs-parameter

https://github.com/joedolson/my-calendar/releases/tag/v3.8.11

https://github.com/joedolson/my-calendar/commit/de875c25d9651abb041b2dfe32f60a4320c66496

https://github.com/joedolson/my-calendar/blob/v3.8.10/src/my-calendar-search.php#L170

https://github.com/joedolson/my-calendar

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3

CVSS v4