{"id":"CVE-2026-53673","aliases":["EUVD-2026-35877","GHSA-j3j5-5m8v-7gvc"],"status":"published","title":"BuddyPress 14.4.0 Private Message IDOR via REST API user_id Parameter","description":"BuddyPress 14.4.0 contains an insecure direct object reference vulnerability in the messages REST API that allows authenticated attackers to access arbitrary private message threads by supplying a user_id parameter in the request. Attackers can pass another user's identifier to the get_item_permissions_check method, which validates the supplied user_id instead of the logged-in user and is reused by the update and delete handlers, to read, reply to, or delete any user's private messages.","severity":{"version":"4.0","score":8.6,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00371,"percentile":0.31309,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-639"],"published":"2026-06-09T23:44:20Z","modified":"2026-10-08T16:17:19Z","fixes":[{"ecosystem":"Packagist","package":"buddypress/buddypress","fixed_in":["14.5.0"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Packagist","package":"buddypress/buddypress","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"14.5.0"}]}]},{"source":"osv","ecosystem":"Packagist","package":"buddypress/buddypress","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"14.5.0"}]}],"versions":["10.0.0","10.0.0-RC1","10.0.0-beta1","10.0.0-beta2","10.1.0","10.2.0","10.3.0","10.4.0","10.5.0","10.6.0","10.6.1","10.6.2","10.6.3","10.6.4","11.0.0","11.0.0-RC1","11.0.0-beta1","11.0.0-beta2","11.0.0-beta3","11.1.0","11.2.0","11.3.1","11.3.2","11.4.0","11.4.0-beta1","11.4.1","11.4.2","11.4.3","11.4.4","11.5.1","11.5.2","11.6.0","11.6.2","12.0.0","12.0.0-RC1","12.0.0-beta1","12.0.0-beta2","12.0.0-beta3","12.0.0-beta4","12.1.1","12.2.0","12.3.0","12.4.0","12.4.1","12.5.0","12.5.1","12.5.2","12.5.3","12.6.0","12.7.0","12.7.2","14.0.0","14.0.0-RC1","14.0.0-beta1","14.0.0-beta2","14.1.0","14.2.1","14.3.1","14.3.3","14.3.4","14.4.0","2.2-beta1","2.2-beta2","2.2-rc1","2.2-rc2","2.2.0","2.2.1","2.2.2","2.2.2.1","2.2.3","2.2.3.1","2.2.4","2.2.5","2.2.6","2.3.0","2.3.0-beta-2","2.3.0-beta1","2.3.0-rc1","2.3.1","2.3.2","2.3.2.1","2.3.3","2.3.4","2.3.5","2.3.6","2.3.7","2.4.0","2.4.0-beta1","2.4.0-beta2","2.4.0-rc1","2.4.2","2.4.3","2.4.4","2.4.5","2.5.0","2.5.0-beta1","2.5.0-rc1","2.5.1","2.5.2","2.5.3","2.5.4","2.5.5","2.6.0","2.6.0-beta1","2.6.0-rc1","2.6.1","2.6.1.1","2.6.2","2.6.3","2.6.4","2.7.0","2.7.0-beta1","2.7.0-rc1","2.7.0-rc2","2.7.1","2.7.2","2.7.3","2.7.4","2.7.5","2.8.0","2.8.0-RC1","2.8.0-beta1","2.8.1","2.8.2","2.9.0","2.9.0-RC1","2.9.0-beta2","2.9.1","2.9.2","2.9.3","2.9.4","2.9.5.1","3.0.0","3.0.0-RC2","3.0.0-beta1","3.0.0-beta2","3.1.0","3.2.0","3.2.1","4.0.0","4.0.0-RC1","4.0.0-beta1","4.1.0","4.2.0","4.3.0","4.4.0","4.4.1","5.0.0","5.0.0-RC1","5.0.0-RC2","5.0.0-beta1","5.0.0-beta2","5.1.0","5.1.0-beta1","5.1.1","5.1.2","5.2.0","5.2.1","5.2.2","6.0.0","6.0.0-RC1","6.0.0-RC2","6.0.0-beta1","6.0.0-beta2","6.1.0","6.2.0","6.2.0-beta1","6.3.0","6.4.0","6.4.2","6.4.3","7.0.0","7.0.0-RC1","7.0.0-RC2","7.0.0-beta1","7.0.0-beta2","7.1.0","7.2.0","7.2.1","7.3.0","7.3.2","7.3.3","7.3.4","8.0.0","8.0.0-RC1","8.0.0-beta1","8.0.0-beta2","8.0.2","8.0.3","8.0.4","9.0.0","9.0.0-RC1","9.1.1","9.2.0","9.2.1","9.2.2","9.2.3","9.2.4"]}],"products":[{"vendor":"buddypress","product":"buddypress"},{"vendor":"wordpress","product":"buddypress"}],"references":[{"url":"https://buddypress.org/","tags":["product"]},{"url":"https://wordpress.org/plugins/buddypress/","tags":["product"]},{"url":"https://www.vulncheck.com/advisories/buddypress-private-message-idor-via-rest-api-user-id-parameter","tags":["third-party-advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-53673","tags":["advisory"]},{"url":"https://buddypress.org","tags":["web"]},{"url":"https://wordpress.org/plugins/buddypress","tags":["web"]},{"url":"https://github.com/buddypress/buddypress/commit/27d41e9749a878103b3a673b37dfc92b7f8f2cb7","tags":["web"]},{"url":"https://github.com/advisories/GHSA-j3j5-5m8v-7gvc"},{"url":"https://github.com/buddypress/BuddyPress","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-53673","title":"BuddyPress 14.4.0 Private Message IDOR via REST API user_id Parameter","description":"BuddyPress 14.4.0 contains an insecure direct object reference vulnerability in the messages REST API that allows authenticated attackers to access arbitrary private message threads by supplying a user_id parameter in the request. Attackers can pass another user's identifier to the get_item_permissions_check method, which validates the supplied user_id instead of the logged-in user and is reused by the update and delete handlers, to read, reply to, or delete any user's private messages.","status":"published","published":"2026-06-09T23:44:20.697Z","modified":"2026-10-08T15:23:07.681Z","cvss":[{"version":"4.0","score":8.6,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","level":"high","assessor":"cna"},{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","level":"high","assessor":"cna"}],"cwes":["CWE-639"],"updated_at":"2026-11-02T14:19:59.761005Z"}],"euvd":[{"id":"EUVD-2026-35877","description":"BuddyPress 14.4.0 contains an insecure direct object reference vulnerability in the messages REST API that allows authenticated attackers to access arbitrary private message threads by supplying a user_id parameter in the request. Attackers can pass another user's identifier to the get_item_permissions_check method, which validates the supplied user_id instead of the logged-in user and is reused by the update and delete handlers, to read, reply to, or delete any user's private messages.","status":"published","published":"2026-06-09T23:44:20Z","modified":"2026-10-08T15:23:07Z","cvss":[{"version":"4.0","score":8.6,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-02T17:27:31.696571Z"}],"ghsa":[{"id":"GHSA-j3j5-5m8v-7gvc","title":"BuddyPress: Authenticated attackers can access arbitrary private message threads via user_id request parameter","description":"BuddyPress 14.4.0 contains an insecure direct object reference vulnerability in the messages REST API that allows authenticated attackers to access arbitrary private message threads by supplying a user_id parameter in the request. Attackers can pass another user's identifier to the get_item_permissions_check method, which validates the supplied user_id instead of the logged-in user and is reused by the update and delete handlers, to read, reply to, or delete any user's private messages.","status":"published","published":"2026-06-10T00:31:53Z","modified":"2026-08-12T18:47:41Z","cvss":[{"version":"4.0","score":8.6,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","level":"high"},{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","level":"high"}],"cwes":["CWE-639"],"updated_at":"2026-11-02T14:40:58.888637Z"}],"nvd":[{"id":"CVE-2026-53673","description":"BuddyPress 14.4.0 contains an insecure direct object reference vulnerability in the messages REST API that allows authenticated attackers to access arbitrary private message threads by supplying a user_id parameter in the request. Attackers can pass another user's identifier to the get_item_permissions_check method, which validates the supplied user_id instead of the logged-in user and is reused by the update and delete handlers, to read, reply to, or delete any user's private messages.","status":"published","published":"2026-06-10T00:16:55.04Z","modified":"2026-10-08T16:17:19.52Z","cvss":[{"version":"4.0","score":8.6,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high","assessor":"secondary"},{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","level":"high","assessor":"secondary"}],"cwes":["CWE-639"],"updated_at":"2026-11-02T14:12:23.485267Z"}],"osv":[{"id":"GHSA-j3j5-5m8v-7gvc","title":"BuddyPress: Authenticated attackers can access arbitrary private message threads via user_id request parameter","description":"BuddyPress 14.4.0 contains an insecure direct object reference vulnerability in the messages REST API that allows authenticated attackers to access arbitrary private message threads by supplying a user_id parameter in the request. Attackers can pass another user's identifier to the get_item_permissions_check method, which validates the supplied user_id instead of the logged-in user and is reused by the update and delete handlers, to read, reply to, or delete any user's private messages.","status":"published","published":"2026-06-10T00:31:53Z","modified":"2026-09-10T03:50:49.885985696Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","level":"high"},{"version":"4.0","score":8.6,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-639"],"updated_at":"2026-11-02T15:46:49.977351Z"}]}}