{"affected":[{"defaultStatus":"unaffected","product":"openemr","source":"CNA: VulnCheck","vendor":"openemr","versions":[{"lessThan":"8.5.0","status":"affected","version":"0","versionType":"semver"},{"status":"unaffected","version":"8.5.0","versionType":"semver"}]}],"cveId":"CVE-2026-126456","cwes":["CWE-79"],"description":"OpenEMR before 8.5.0 contains a stored cross-site scripting vulnerability in the Fee Sheet notecodes field, which is escaped with the wrong context. Attackers with clinician access can inject a payload that breaks out of the single-quoted value attribute and executes in higher-privileged users' browsers.","epss":{"date":"2026-11-13","percentile":0.14526,"score":0.00235},"exploits":[{"kind":"exploit","source":"ADP: CISA-ADP","url":"https://github.com/openemr/openemr/security/advisories/GHSA-ff55-qvf9-2fgm"}],"kev":null,"metrics":[{"score":5.1,"severity":"medium","source":"CNA: VulnCheck","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N","version":"4.0"},{"score":5.4,"severity":"medium","source":"CNA: VulnCheck","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","version":"3.1"},{"score":5.1,"severity":"medium","source":"NVD: disclosure@vulncheck.com","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/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":5.4,"severity":"medium","source":"NVD: disclosure@vulncheck.com","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","version":"3.1"}],"modifiedAt":1794597714976,"publishedAt":1794562509311,"references":[{"source":"CNA: VulnCheck","tags":["vendor-advisory"],"url":"https://github.com/openemr/openemr/security/advisories/GHSA-ff55-qvf9-2fgm"},{"source":"CNA: VulnCheck","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/openemr-before-8.5.0-stored-xss-via-fee-sheet-notecodes-field"},{"source":"ADP: CISA-ADP","tags":["exploit"],"url":"https://github.com/openemr/openemr/security/advisories/GHSA-ff55-qvf9-2fgm"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/openemr/openemr/security/advisories/GHSA-ff55-qvf9-2fgm"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://www.vulncheck.com/advisories/openemr-before-8.5.0-stored-xss-via-fee-sheet-notecodes-field"}],"remediation":[],"revision":"c41c00497f5648cb9c766681e2ff50dee07e014a401322e8dcd66ff3597b06f9","sources":[{"modifiedAt":1794597714976,"name":"CNA: VulnCheck","retrievedAt":1794600579873,"url":"https://www.cve.org/CVERecord?id=CVE-2026-126456"},{"modifiedAt":1794565073953,"name":"NVD","retrievedAt":1794572219293,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-126456"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1794600594937,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-126456"}],"ssvc":{"assessedAt":1794597691478,"automatable":"no","exploitation":"poc","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"OpenEMR before 8.5.0 Stored XSS via Fee Sheet notecodes field","updatedAt":1794600594937}