{"id":"CVE-2021-20840","aliases":["EUVD-2021-8252","GHSA-6wcx-352r-rcj5"],"status":"published","title":"Cross-site scripting vulnerability in Booking Package - Appointment Booking Calendar System...","description":"Cross-site scripting vulnerability in Booking Package - Appointment Booking Calendar System versions prior to 1.5.11 allows a remote attacker to inject an arbitrary script via unspecified vectors.","severity":{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.01284,"percentile":0.70342,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-79"],"published":"2021-11-24T08:25:40Z","modified":"2026-06-17T03:34:31Z","products":[{"vendor":"saasproject","product":"booking package - appointment booking calendar system"},{"vendor":"saasproject","product":"booking_package"}],"references":[{"url":"https://wordpress.org/plugins/booking-package/","tags":["x_refsource_MISC","x_transferred","Product"]},{"url":"https://saasproject.net/ja/fixed/20211019.php","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://jvn.jp/en/jp/JVN68066589/index.html","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-20840"},{"url":"https://wordpress.org/plugins/booking-package"},{"url":"https://github.com/advisories/GHSA-6wcx-352r-rcj5"}],"sources":{"cve":[{"id":"CVE-2021-20840","description":"Cross-site scripting vulnerability in Booking Package - Appointment Booking Calendar System versions prior to 1.5.11 allows a remote attacker to inject an arbitrary script via unspecified vectors.","status":"published","published":"2021-11-24T08:25:40Z","modified":"2024-08-03T17:53:22.545Z","updated_at":"2026-11-02T14:32:55.564736Z"}],"euvd":[{"id":"EUVD-2021-8252","description":"Cross-site scripting vulnerability in Booking Package - Appointment Booking Calendar System versions prior to 1.5.11 allows a remote attacker to inject an arbitrary script via unspecified vectors.","status":"published","published":"2021-11-24T08:25:40Z","modified":"2024-08-03T17:53:22Z","updated_at":"2026-11-03T03:25:07.874589Z"}],"ghsa":[{"id":"GHSA-6wcx-352r-rcj5","title":"Cross-site scripting vulnerability in Booking Package - Appointment Booking Calendar System...","description":"Cross-site scripting vulnerability in Booking Package - Appointment Booking Calendar System versions prior to 1.5.11 allows a remote attacker to inject an arbitrary script via unspecified vectors.","status":"published","published":"2021-11-25T00:00:38Z","modified":"2026-03-14T05:09:47Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:06:37.566427Z"}],"nvd":[{"id":"CVE-2021-20840","description":"Cross-site scripting vulnerability in Booking Package - Appointment Booking Calendar System versions prior to 1.5.11 allows a remote attacker to inject an arbitrary script via unspecified vectors.","status":"published","published":"2021-11-24T16:15:13.043Z","modified":"2026-06-17T03:34:31.43Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:07:01.428028Z"}]}}