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CVE-2026-33933

Reflected XSS via Unescaped contextName Parameter in Custom Template Editor

Published: Mar 25, 2026Updated: Mar 26, 2026 Sources: CVE List NVDCWE-79
NVD MITRE
6.1CVSSMEDIUM
EPSS Score
0.3%
Top 81.5%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

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.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:RS:CC:LI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:CScope
Changed
Impact
C:LConfidentiality
Low
I:LIntegrity
Low
A:NAvailability
None
Open in CVSS calculator →

Weaknesses

CWE-79

Affected Products

openemropen-emr
On-premWeb App
Enterprise Software / document-mgmt
openemropenemr
On-premWeb App
Enterprise Software / itsm-monitoring
open-emross-projectUSEnterprise Softwareaka openemr
openemross-projectEnterprise Softwareaka openemr/openemr, openemr

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Execution
Initial Access
View detailed technique mapping

References

https://github.com/openemr/openemr/commit/d5c8d49ef19983472b2d7db0dbebd2dac9d6a200
github.com
https://github.com/openemr/openemr/commit/de9b6eb0da574430e8223c014cf4a05b0adc29d8
github.com
https://github.com/openemr/openemr/releases/tag/v8_0_0_3
github.com
and 1 more references View all →

Timeline

Published
Mar 25, 2026
Last Updated
Mar 26, 2026

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