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TI-2026-29258 Aliases CVE-2026-40508GHSA-xvw4-236w-442q

OpenEMR < 8.3.0 Stored XSS via Patient Portal Template Import Handler

Priority MEDIUM 56CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
Cross-site scripting
Confidentiality · integrity · availability
None · None · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00298 22nd percentileScored 2026-11-07
Fix Fixed openemr (openemr): 8.3.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
openemropenemrbefore 8.3.08.3.0Patch availableCNA
  • openemr Vendoropenemr Affected before 8.3.0 Fixed in 8.3.0 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:open-emr:openemr:*:*:*:*:*:*:*:*——Open-Emr
  • cpe:2.3:a:open-emr:openemr:*:*:*:*:*:*:*:* Versions — — ·Open-Emr

Remediation

  • Fix · CNA openemr (openemr) Fixed in 8.3.0

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    openemr 8.3.0

    4 records Highest priority Priority MEDIUM 3 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2026-53546 OpenEMR < 8.3.0 Path Traversal Information Disclosure via EDI Archive RestorePriority MEDIUM 57
    • TI-2026-29257 OpenEMR < 8.3.0 Reflected XSS via templateHtml Parameter in Patient PortalPriority MEDIUM 56
    • TI-2026-29259 OpenEMR < 8.3.0 CSRF via DICOM Viewer web_path ParameterPriority LOW 29
    Show all 4 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-40508
  2. 2026-10-03 Alias added: GHSA-xvw4-236w-442q

References

Patch 1

Advisory 1

Other 1

  • TI-2026-24664 SQL Injection Vulnerability in ajax graphs library (OpenEMR) CVSS 3.1HIGH 8.8
  • TI-2026-85645 Missing write ACL lets users reassign documents in OpenEMR CVSS 3.1CRITICAL 9.6
  • TI-2026-28796 OpenEMR 8.2.0 Remote Code Execution via CategoryTree eval() Injection CVSS 4.0CRITICAL 9.4
  • TI-2026-20308 OpenEMR's payments gateway_api_key secret rendered into client JS code CVSS 3.1CRITICAL 9.6
  • TI-2026-20093 OpenEMR has SQL Injection in Patient API Sort Parameter CVSS 3.1CRITICAL 10.0
  • TI-2026-20048 OpenEMR Arbitrary File Read Vulnerability CVSS 3.1CRITICAL 10.0
See all 153 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences