{"id":"CVE-2021-24927","aliases":["EUVD-2021-11839","GHSA-gcvg-gpgp-f6cf"],"status":"published","title":"My Calendar \u003c 3.2.18 - Subscriber+ Reflected Cross-Site Scripting","description":"The My Calendar WordPress plugin before 3.2.18 does not sanitise and escape the callback parameter of the mc_post_lookup AJAX action (available to any authenticated user) before outputting it back in the response, leading to a Reflected Cross-Site Scripting issue","severity":{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.0062,"percentile":0.50047,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-79"],"published":"2021-11-29T08:25:52Z","modified":"2026-06-17T03:41:08Z","products":[{"vendor":"joe dolson","product":"my calendar"},{"vendor":"my_calendar_project","product":"my_calendar"},{"vendor":"unknown","product":"my calendar"}],"references":[{"url":"https://wpscan.com/vulnerability/86f3acc7-8902-4215-bd75-6105d601524e","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-24927"},{"url":"https://github.com/advisories/GHSA-gcvg-gpgp-f6cf"}],"sources":{"cve":[{"id":"CVE-2021-24927","title":"My Calendar \u003c 3.2.18 - Subscriber+ Reflected Cross-Site Scripting","description":"The My Calendar WordPress plugin before 3.2.18 does not sanitise and escape the callback parameter of the mc_post_lookup AJAX action (available to any authenticated user) before outputting it back in the response, leading to a Reflected Cross-Site Scripting issue","status":"published","published":"2021-11-29T08:25:52Z","modified":"2024-08-03T19:49:12.67Z","cwes":["CWE-79"],"updated_at":"2026-11-02T14:33:05.000797Z"}],"euvd":[{"id":"EUVD-2021-11839","description":"The My Calendar WordPress plugin before 3.2.18 does not sanitise and escape the callback parameter of the mc_post_lookup AJAX action (available to any authenticated user) before outputting it back in the response, leading to a Reflected Cross-Site Scripting issue","status":"published","published":"2021-11-29T08:25:52Z","modified":"2024-08-03T19:49:12Z","updated_at":"2026-11-03T03:24:55.415131Z"}],"ghsa":[{"id":"GHSA-gcvg-gpgp-f6cf","title":"The My Calendar WordPress plugin before 3.2.18 does not sanitise and escape the callback...","description":"The My Calendar WordPress plugin before 3.2.18 does not sanitise and escape the callback parameter of the mc_post_lookup AJAX action (available to any authenticated user) before outputting it back in the response, leading to a Reflected Cross-Site Scripting issue","status":"published","published":"2021-11-30T00:00:50Z","modified":"2023-02-01T05:06:38Z","cwes":["CWE-79"],"updated_at":"2026-11-02T14:50:23.506103Z"}],"nvd":[{"id":"CVE-2021-24927","description":"The My Calendar WordPress plugin before 3.2.18 does not sanitise and escape the callback parameter of the mc_post_lookup AJAX action (available to any authenticated user) before outputting it back in the response, leading to a Reflected Cross-Site Scripting issue","status":"published","published":"2021-11-29T09:15:08.083Z","modified":"2026-06-17T03:41:08.867Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":3.5,"vector":"AV:N/AC:M/Au:S/C:N/I:P/A:N","level":"low","assessor":"primary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:07:01.811115Z"}]}}