{"id":"CVE-2024-26145","aliases":["EUVD-2024-23428","GHSA-4hh7-6m34-p2jp"],"status":"published","title":"Uninvited user is able to join and mark the attendance of the the private event","description":"Discourse Calendar adds the ability to create a dynamic calendar in the first post of a topic on Discourse. Uninvited users are able to gain access to private events by crafting a request to update their attendance. This problem is resolved in commit dfc4fa15f340189f177a1d1ab2cc94ffed3c1190. As a workaround, one may use post visibility to limit access.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00393,"percentile":0.33847,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-863"],"published":"2024-02-21T17:19:11Z","modified":"2026-11-05T10:30:54Z","products":[{"vendor":"discourse","product":"calendar"},{"vendor":"discourse","product":"discourse-calendar"}],"references":[{"url":"https://github.com/discourse/discourse-calendar/security/advisories/GHSA-4hh7-6m34-p2jp","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory","advisory"]},{"url":"https://github.com/discourse/discourse-calendar/commit/dfc4fa15f340189f177a1d1ab2cc94ffed3c1190","tags":["x_refsource_MISC","x_transferred","Patch","fix"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/26xxx/CVE-2024-26145.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2024-26145","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2024-26145","title":"Uninvited user is able to join and mark the attendance of the the private event","description":"Discourse Calendar adds the ability to create a dynamic calendar in the first post of a topic on Discourse. Uninvited users are able to gain access to private events by crafting a request to update their attendance. This problem is resolved in commit dfc4fa15f340189f177a1d1ab2cc94ffed3c1190. As a workaround, one may use post visibility to limit access.","status":"published","published":"2024-02-21T17:19:11.128Z","modified":"2024-08-27T15:08:13.973Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-863"],"updated_at":"2026-11-02T14:33:59.512321Z"}],"euvd":[{"id":"EUVD-2024-23428","description":"Discourse Calendar adds the ability to create a dynamic calendar in the first post of a topic on Discourse. Uninvited users are able to gain access to private events by crafting a request to update their attendance. This problem is resolved in commit dfc4fa15f340189f177a1d1ab2cc94ffed3c1190. As a workaround, one may use post visibility to limit access.","status":"published","published":"2024-02-21T17:19:11Z","modified":"2024-08-27T15:08:13Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-03T00:56:10.956482Z"}],"nvd":[{"id":"CVE-2024-26145","description":"Discourse Calendar adds the ability to create a dynamic calendar in the first post of a topic on Discourse. Uninvited users are able to gain access to private events by crafting a request to update their attendance. This problem is resolved in commit dfc4fa15f340189f177a1d1ab2cc94ffed3c1190. As a workaround, one may use post visibility to limit access.","status":"published","published":"2024-02-21T18:15:51.87Z","modified":"2026-06-17T07:17:11.623Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"secondary"},{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-863"],"updated_at":"2026-11-02T14:09:37.655131Z"}],"osv":[{"id":"CVE-2024-26145","title":"Uninvited user is able to join and mark the attendance of the the private event","description":"Discourse Calendar adds the ability to create a dynamic calendar in the first post of a topic on Discourse. Uninvited users are able to gain access to private events by crafting a request to update their attendance. This problem is resolved in commit dfc4fa15f340189f177a1d1ab2cc94ffed3c1190. As a workaround, one may use post visibility to limit access.","status":"published","published":"2024-02-21T17:19:11.128Z","modified":"2026-11-05T10:30:54.28804093Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-863"],"updated_at":"2026-11-05T13:30:49.23793Z"}]}}