{"affected":[{"defaultStatus":"unaffected","product":"openemr","source":"CNA: VulnCheck","vendor":"openemr","versions":[{"lessThan":"8.3.0","status":"affected","version":"0","versionType":"semver"},{"status":"unaffected","version":"8.3.0","versionType":"semver"}]}],"cveId":"CVE-2026-124476","cwes":["CWE-639"],"description":"OpenEMR before 8.3.0 contains an insecure direct object reference in portal/lib/paylib.php, which writes the request-supplied form_pid (or the patient_id_cc value in Sphere data) to onsite_portal_activity without checking it against the session patient. Authenticated portal patients can submit portal-save, review-save, AuthorizeNet, Stripe, or Sphere requests to insert or modify forged payment-audit records in other patients' billing records.","epss":{"date":"2026-11-12","percentile":0.07783,"score":0.00181},"exploits":[{"kind":"exploit","source":"ADP: CISA-ADP","url":"https://github.com/openemr/openemr/security/advisories/GHSA-c9wg-vrr9-65wj"}],"kev":null,"metrics":[{"score":7.1,"severity":"high","source":"CNA: VulnCheck","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N","version":"4.0"},{"score":6.5,"severity":"medium","source":"CNA: VulnCheck","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","version":"3.1"},{"score":7.1,"severity":"high","source":"NVD: disclosure@vulncheck.com","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/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","version":"4.0"},{"score":6.5,"severity":"medium","source":"NVD: disclosure@vulncheck.com","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","version":"3.1"}],"modifiedAt":1794540450466,"publishedAt":1794143757286,"references":[{"source":"CNA: VulnCheck","tags":["vendor-advisory"],"url":"https://github.com/openemr/openemr/security/advisories/GHSA-c9wg-vrr9-65wj"},{"source":"CNA: VulnCheck","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/openemr-before-8.3.0-idor-via-form-pid-in-portal-lib-paylib-php"},{"source":"ADP: CISA-ADP","tags":["exploit"],"url":"https://github.com/openemr/openemr/security/advisories/GHSA-c9wg-vrr9-65wj"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/openemr/openemr/security/advisories/GHSA-c9wg-vrr9-65wj"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://www.vulncheck.com/advisories/openemr-before-8.3.0-idor-via-form-pid-in-portal-lib-paylib-php"}],"remediation":[],"revision":"b7dfd7e0735c8e7978a6022e51ae121016978fbcb30c604130203cf6eed59943","sources":[{"modifiedAt":1794540450466,"name":"CNA: VulnCheck","retrievedAt":1794542942031,"url":"https://www.cve.org/CVERecord?id=CVE-2026-124476"},{"modifiedAt":1794347200963,"name":"NVD","retrievedAt":1794356375648,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-124476"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1794542961510,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-124476"}],"ssvc":{"assessedAt":1794540428876,"automatable":"no","exploitation":"poc","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"OpenEMR before 8.3.0 IDOR via form_pid in portal/lib/paylib.php","updatedAt":1794542961510}