Medium severity · published Mar 25, 2026
CVE-2026-33933
Reflected XSS via Unescaped contextName Parameter in Custom Template Editor
6.1
CVSS
0.3%
EPSS
No
On KEV
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
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 21% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OP
openemr · openemr
>= 7.0.2.1, < 8.0.0.3 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-33933
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-33933
Patch
https://github.com/openemr/openemr/commit/d5c8d49ef19983472b2d7db0dbebd2dac9d6a200
Patch
https://github.com/openemr/openemr/commit/de9b6eb0da574430e8223c014cf4a05b0adc29d8
Product
https://github.com/openemr/openemr/releases/tag/v8_0_0_3
Exploit
https://github.com/openemr/openemr/security/advisories/GHSA-9qh7-cfq4-j7c3
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