GHSA-j2m8-rg5v-vvqcMediumCVSS 6.5
My Calendar WordPress plugin 3.8.8 before 3.8.11 contains a shortcode injection vulnerability...
🔗 CVE IDs covered (1)
📋 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 (7)
- https://nvd.nist.gov/vuln/detail/CVE-2026-119714
- https://github.com/joedolson/my-calendar/commit/de875c25d9651abb041b2dfe32f60a4320c66496
- https://github.com/joedolson/my-calendar
- https://github.com/joedolson/my-calendar/blob/v3.8.10/src/my-calendar-search.php#L170
- https://github.com/joedolson/my-calendar/releases/tag/v3.8.11
- https://www.vulncheck.com/advisories/my-calendar-3.8.8-before-3.8.11-unauthenticated-shortcode-injection-via-mcs-parameter
- https://github.com/advisories/GHSA-j2m8-rg5v-vvqc