{"id":"CVE-2021-24147","aliases":["EUVD-2021-11061","GHSA-38c2-7994-ggcm"],"status":"published","title":"Modern Events Calendar Lite \u003c 5.16.5 - Authenticated Stored Cross-Site Scripting (XSS)","description":"Unvalidated input and lack of output encoding in the Modern Events Calendar Lite WordPress plugin, versions before 5.16.5, did not sanitise the mic_comment field (Notes on time) when adding/editing an event, allowing users with privilege as low as author to add events with a Cross-Site Scripting payload in them, which will be triggered in the frontend when viewing the event.","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":"2026-11-09","score":0.00748,"percentile":0.55183,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-79"],"published":"2021-03-18T14:57:50Z","modified":"2026-10-24T10:30:19Z","products":[{"vendor":"unknown","product":"modern events calendar lite"},{"vendor":"webnus","product":"modern_events_calendar_lite"},{"vendor":"webnus/","product":"modern events calendar lite"}],"references":[{"url":"https://wpscan.com/vulnerability/0f9ba284-5d7e-4092-8344-c68316b0146f","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","evidence"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-24147"},{"url":"https://github.com/advisories/GHSA-38c2-7994-ggcm"}],"sources":{"cve":[{"id":"CVE-2021-24147","title":"Modern Events Calendar Lite \u003c 5.16.5 - Authenticated Stored Cross-Site Scripting (XSS)","description":"Unvalidated input and lack of output encoding in the Modern Events Calendar Lite WordPress plugin, versions before 5.16.5, did not sanitise the mic_comment field (Notes on time) when adding/editing an event, allowing users with privilege as low as author to add events with a Cross-Site Scripting payload in them, which will be triggered in the frontend when viewing the event.","status":"published","published":"2021-03-18T14:57:50Z","modified":"2024-08-03T19:21:18.252Z","cwes":["CWE-79"],"updated_at":"2026-11-02T14:33:05.000797Z"}],"euvd":[{"id":"EUVD-2021-11061","description":"Unvalidated input and lack of output encoding in the Modern Events Calendar Lite WordPress plugin, versions before 5.16.5, did not sanitise the mic_comment field (Notes on time) when adding/editing an event, allowing users with privilege as low as author to add events with a Cross-Site Scripting payload in them, which will be triggered in the frontend when viewing the event.","status":"published","published":"2021-03-18T14:57:50Z","modified":"2024-08-03T19:21:18Z","updated_at":"2026-11-03T03:24:59.071017Z"}],"ghsa":[{"id":"GHSA-38c2-7994-ggcm","title":"Unvalidated input and lack of output encoding in the Modern Events Calendar Lite WordPress plugin...","description":"Unvalidated input and lack of output encoding in the Modern Events Calendar Lite WordPress plugin, versions before 5.16.5, did not sanitise the mic_comment field (Notes on time) when adding/editing an event, allowing users with privilege as low as author to add events with a Cross-Site Scripting payload in them, which will be triggered in the frontend when viewing the event.","status":"published","published":"2022-05-24T17:44:51Z","modified":"2023-01-29T05:06:55Z","cwes":["CWE-79"],"updated_at":"2026-11-02T14:46:07.317218Z"}],"nvd":[{"id":"CVE-2021-24147","description":"Unvalidated input and lack of output encoding in the Modern Events Calendar Lite WordPress plugin, versions before 5.16.5, did not sanitise the mic_comment field (Notes on time) when adding/editing an event, allowing users with privilege as low as author to add events with a Cross-Site Scripting payload in them, which will be triggered in the frontend when viewing the event.","status":"published","published":"2021-03-18T15:15:15.557Z","modified":"2026-06-17T03:39:28.377Z","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":"2026-11-02T14:06:50.805771Z"}],"osv":[{"id":"CVE-2021-24147","description":"Unvalidated input and lack of output encoding in the Modern Events Calendar Lite WordPress plugin, versions before 5.16.5, did not sanitise the mic_comment field (Notes on time) when adding/editing an event, allowing users with privilege as low as author to add events with a Cross-Site Scripting payload in them, which will be triggered in the frontend when viewing the event.","status":"published","published":"2021-03-18T15:15:15.557Z","modified":"2026-10-24T10:30:19.10362949Z","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"}],"updated_at":"2026-11-02T15:44:18.778776Z"}]}}