{"cve":"CVE-2026-40508","nvd":{"published":"2026-08-19T15:17:01.707","modified":"2026-10-27T13:10:00.360","status":"Deferred","description":"OpenEMR before 8.3.0 contains a stored cross-site scripting vulnerability in the patient portal template import handler that allows authenticated attackers with Forms Administration permissions to upload template files containing arbitrary HTML or JavaScript. Attackers can inject malicious scripts through the template upload functionality, which are stored without sanitization and execute in the browser of any other Forms Administration user who views the template in the HTML editor.","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","score":5.1},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","score":5.4},"cwes":["CWE-79"],"references":["https://github.com/openemr/openemr/commit/ba316dd1d8de1291102da3f20f64240729ff899e","https://github.com/openemr/openemr/releases/tag/v8_3_0","https://github.com/openemr/openemr/security/advisories/GHSA-5293-8q47-cf44","https://www.vulncheck.com/advisories/openemr-stored-xss-via-patient-portal-template-import-handler","https://github.com/openemr/openemr/security/advisories/GHSA-5293-8q47-cf44"],"products":[],"source":"nvd","synced_at":"2026-10-27T13:36:07.289888057+00:00"},"epss":{"cve":"CVE-2026-40508","score":0.00298,"percentile":0.22323,"date":"2026-10-26"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}