{"id":"CVE-2026-88764","aliases":["EUVD-2026-76956","GHSA-cmhf-4mfx-3gf7"],"status":"published","title":"Simple Membership \u003c 4.7.8 - Subscriber+ Membership Level Escalation via PayPal Standard subsc_ref","description":"The Simple Membership WordPress plugin before 4.7.8 does not validate that the membership level supplied in a PayPal payment notification matches the level configured for the paid payment button, allowing members to pay for a lower-priced membership while being granted a higher, more privileged membership level.","severity":{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","level":"medium","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-10","score":0.0023,"percentile":0.13956,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-269"],"published":"2026-09-13T06:00:08Z","modified":"2026-09-14T21:10:17Z","products":[{"vendor":"unknown","product":"simple membership"},{"vendor":"wpinsider-1","product":"simple membership"}],"references":[{"url":"https://wpscan.com/vulnerability/54fdf46e-0385-40a3-b3bc-a862dc0fb03e/","tags":["exploit","vdb-entry","technical-description"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-88764"},{"url":"https://wpscan.com/vulnerability/54fdf46e-0385-40a3-b3bc-a862dc0fb03e"},{"url":"https://github.com/advisories/GHSA-cmhf-4mfx-3gf7"}],"sources":{"cve":[{"id":"CVE-2026-88764","title":"Simple Membership \u003c 4.7.8 - Subscriber+ Membership Level Escalation via PayPal Standard subsc_ref","description":"The Simple Membership WordPress plugin before 4.7.8 does not validate that the membership level supplied in a PayPal payment notification matches the level configured for the paid payment button, allowing members to pay for a lower-priced membership while being granted a higher, more privileged membership level.","status":"published","published":"2026-09-13T06:00:08.69Z","modified":"2026-09-13T10:44:51.651Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","level":"medium","assessor":"adp"}],"cwes":["CWE-269"],"updated_at":"2026-11-02T13:41:53.237769Z"}],"euvd":[{"id":"EUVD-2026-76956","description":"The Simple Membership WordPress plugin before 4.7.8 does not validate that the membership level supplied in a PayPal payment notification matches the level configured for the paid payment button, allowing members to pay for a lower-priced membership while being granted a higher, more privileged membership level.","status":"published","published":"2026-09-13T06:00:08Z","modified":"2026-09-13T10:44:51Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T17:28:21.556158Z"}],"ghsa":[{"id":"GHSA-cmhf-4mfx-3gf7","title":"The Simple Membership WordPress plugin before 4.7.8 does not validate that the membership level...","description":"The Simple Membership WordPress plugin before 4.7.8 does not validate that the membership level supplied in a PayPal payment notification matches the level configured for the paid payment button, allowing members to pay for a lower-priced membership while being granted a higher, more privileged membership level.","status":"published","published":"2026-09-13T06:33:11Z","modified":"2026-09-13T12:31:09Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-269"],"updated_at":"2026-11-02T15:11:47.193563Z"}],"nvd":[{"id":"CVE-2026-88764","description":"The Simple Membership WordPress plugin before 4.7.8 does not validate that the membership level supplied in a PayPal payment notification matches the level configured for the paid payment button, allowing members to pay for a lower-priced membership while being granted a higher, more privileged membership level.","status":"published","published":"2026-09-13T06:16:25.35Z","modified":"2026-09-14T21:10:17.423Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-269"],"updated_at":"2026-11-02T14:12:46.980627Z"}]}}