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TI-2026-26284 Aliases CVE-2026-33933

Reflected XSS via Unescaped contextName Parameter in Custom Template Editor

Priority MEDIUM 60CWE-79Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

OpenEMR is a free and open source electronic health records and medical practice management application. Starting in version 7.0.2.1 and prior to version 8.0.0.3, a reflected cross-site scripting (XSS) vulnerability in the custom template editor allows an attacker to execute arbitrary JavaScript in an authenticated staff member's browser session by sending them a crafted URL. The attacker does not need an OpenEMR account. Version 8.0.0.3 patches the issue.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00282 20th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed openemr (openemr): 8.0.0.3

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
openemropenemr7.0.2.1 to before 8.0.0.38.0.0.3Patch availableCNA
  • openemr Vendoropenemr Affected 7.0.2.1 to before 8.0.0.3 Fixed in 8.0.0.3 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:open-emr:openemr:*:*:*:*:*:*:*:*7.0.2.1 to before 8.0.0.3VulnerableOpen-Emr
  • cpe:2.3:a:open-emr:openemr:*:*:*:*:*:*:*:* Versions 7.0.2.1 to before 8.0.0.3 Vulnerable ·Open-Emr

Remediation

  • Fix · CNA openemr (openemr) Fixed in 8.0.0.3

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-33933
  2. 2026-10-25 EPSS moved to the below the 50th percentile

References

Exploit 1

Patch 2

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