{"id":"CVE-2026-41657","state":"PUBLISHED","title":"Admidio: Cross-Organization Member Data Exposure via Permission Check Mismatch in contacts_data.php","description":"Admidio is an open-source user management solution. Prior to version 5.0.9, the contacts_data.php endpoint uses a weaker permission check (isAdministratorUsers(), requiring only rol_edit_user=true) than the frontend UI (contacts.php) which correctly requires the stronger isAdministrator() (requiring rol_administrator=true) and the contacts_show_all system setting. A user manager who is not a full administrator can directly request contacts_data.php?mem_show_filter=3 to retrieve all user records across all organizations in the Admidio instance, bypassing multi-tenant organization isolation. This issue has been patched in version 5.0.9.","publishedAt":"2026-05-07T02:58:09.340Z","updatedAt":"2026-05-07T12:44:25.356Z","severity":{"score":4.9,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["Admidio admidio"],"affected":[{"vendor":"Admidio","product":"admidio","versions":[{"version":"< 5.0.9","status":"affected"}]}],"references":["https://github.com/Admidio/admidio/security/advisories/GHSA-g8p8-94f2-28gr","https://github.com/Admidio/admidio/releases/tag/v5.0.9"],"weaknesses":["CWE-863"],"ingestedAt":"2026-10-29T20:11:57.932Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/41xxx/CVE-2026-41657.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-41657","state":"PUBLISHED","datePublished":"2026-05-07T02:58:09.340Z","dateUpdated":"2026-05-07T12:44:25.356Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-04-21T23:58:43.803Z"},"containers":{"cna":{"title":"Admidio: Cross-Organization Member Data Exposure via Permission Check Mismatch in contacts_data.php","descriptions":[{"lang":"en","value":"Admidio is an open-source user management solution. Prior to version 5.0.9, the contacts_data.php endpoint uses a weaker permission check (isAdministratorUsers(), requiring only rol_edit_user=true) than the frontend UI (contacts.php) which correctly requires the stronger isAdministrator() (requiring rol_administrator=true) and the contacts_show_all system setting. A user manager who is not a full administrator can directly request contacts_data.php?mem_show_filter=3 to retrieve all user records across all organizations in the Admidio instance, bypassing multi-tenant organization isolation. This issue has been patched in version 5.0.9."}],"affected":[{"vendor":"Admidio","product":"admidio","versions":[{"version":"< 5.0.9","status":"affected"}]}],"references":[{"url":"https://github.com/Admidio/admidio/security/advisories/GHSA-g8p8-94f2-28gr","name":"https://github.com/Admidio/admidio/security/advisories/GHSA-g8p8-94f2-28gr","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/Admidio/admidio/releases/tag/v5.0.9","name":"https://github.com/Admidio/admidio/releases/tag/v5.0.9","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":4.9,"baseSeverity":"MEDIUM","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"HIGH","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-863","lang":"en","description":"CWE-863: Incorrect Authorization","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-05-07T02:58:09.340Z"},"source":{"advisory":"GHSA-g8p8-94f2-28gr","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/Admidio/admidio/security/advisories/GHSA-g8p8-94f2-28gr","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-05-07T12:44:19.418128Z","id":"CVE-2026-41657","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-05-07T12:44:25.356Z"}}]}}}