{"document":{"category":"csaf_vex","csaf_version":"2.0","title":"CVE-2026-53673: BuddyPress 14.4.0 Private Message IDOR via REST API user_id Parameter","publisher":{"category":"vendor","name":"HarborGuard Database","namespace":"https://database.harborguard.co"},"tracking":{"id":"CVE-2026-53673","status":"final","version":"1","initial_release_date":"2026-06-09T23:44:20.697Z","current_release_date":"2026-06-10T18:10:40.143Z","revision_history":[{"date":"2026-06-09T23:44:20.697Z","number":"1","summary":"Initial machine-readable export from HarborGuard."}]},"distribution":{"tlp":{"label":"WHITE"},"text":"Public CVE data; freely redistributable."},"notes":[{"category":"description","text":"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.","title":"CVE description"}],"references":[{"category":"self","summary":"CVE-2026-53673 on HarborGuard Database","url":"https://database.harborguard.co/cve/CVE-2026-53673"},{"category":"external","summary":"CVE Record","url":"https://www.cve.org/CVERecord?id=CVE-2026-53673"},{"category":"external","summary":"buddypress.org","url":"https://buddypress.org/"},{"category":"external","summary":"wordpress.org","url":"https://wordpress.org/plugins/buddypress/"},{"category":"external","summary":"VulnCheck Advisory: BuddyPress 14.4.0 Private Message IDOR via REST API user_id Parameter","url":"https://www.vulncheck.com/advisories/buddypress-private-message-idor-via-rest-api-user-id-parameter"}]},"product_tree":{"branches":[{"category":"vendor","name":"BuddyPress","branches":[{"category":"product_name","name":"BuddyPress","branches":[{"category":"product_version_range","name":"<=14.4.0","product":{"name":"BuddyPress BuddyPress <=14.4.0","product_id":"CSAFPID-1","product_identification_helper":{"cpe":"cpe:2.3:a:buddypress:buddypress:*:*:*:*:*:*:*:*"}}}]}]}]},"vulnerabilities":[{"cve":"CVE-2026-53673","title":"BuddyPress 14.4.0 Private Message IDOR via REST API user_id Parameter","notes":[{"category":"description","text":"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.","title":"CVE description"}],"product_status":{"known_affected":["CSAFPID-1"]},"scores":[{"cvss_v4":{"version":"4.0","vectorString":"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","baseScore":8.6,"baseSeverity":"HIGH"},"products":["CSAFPID-1"]}],"remediations":[{"category":"none_available","details":"No fixed version is published yet. Monitor the upstream advisory.","product_ids":["CSAFPID-1"]}]}]}