{"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-2026-126493","cwes":["CWE-79"],"description":"OpenEMR before 8.5.0 contains a stored cross-site scripting vulnerability that allows low-privileged patient portal users to inject JavaScript via the tableArgs field of the onsiteportalactivity API. Attackers can store a payload with spaces that breaks out of an unquoted data-delete-id attribute, executing script when providers click the delete button on the audit review page.","epss":{"date":"2026-11-13","percentile":0.14529,"score":0.00235},"exploits":[{"kind":"exploit","source":"ADP: CISA-ADP","url":"https://github.com/openemr/openemr/security/advisories/GHSA-r4hm-frcj-qr39"}],"kev":null,"metrics":[{"score":4.8,"severity":"medium","source":"CNA: VulnCheck","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/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":4.8,"severity":"medium","source":"NVD: disclosure@vulncheck.com","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/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":1794597855882,"publishedAt":1794562482519,"references":[{"source":"CNA: VulnCheck","tags":["vendor-advisory"],"url":"https://github.com/openemr/openemr/security/advisories/GHSA-r4hm-frcj-qr39"},{"source":"CNA: VulnCheck","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/openemr-before-8.5.0-stored-xss-via-onsiteportalactivity-tableargs"},{"source":"ADP: CISA-ADP","tags":["exploit"],"url":"https://github.com/openemr/openemr/security/advisories/GHSA-r4hm-frcj-qr39"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/openemr/openemr/security/advisories/GHSA-r4hm-frcj-qr39"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://www.vulncheck.com/advisories/openemr-before-8.5.0-stored-xss-via-onsiteportalactivity-tableargs"}],"remediation":[],"revision":"f209c3e68840c28d1d85b3285872a75a334c83d1ba292b1321d9db8feddaa87c","sources":[{"modifiedAt":1794597855882,"name":"CNA: VulnCheck","retrievedAt":1794600584418,"url":"https://www.cve.org/CVERecord?id=CVE-2026-126493"},{"modifiedAt":1794565080053,"name":"NVD","retrievedAt":1794572225667,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-126493"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1794600594354,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-126493"}],"ssvc":{"assessedAt":1794597828314,"automatable":"no","exploitation":"poc","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"OpenEMR before 8.5.0 Stored XSS via OnsitePortalActivity tableArgs","updatedAt":1794600594354}