Cross-site Scripting Vulnerability in OpenEMR by OpenEMR
CVE-2026-33911

5.4MEDIUM

Key Information:

Vendor

Openemr

Status
Openemr
Vendor
CVE Published:
25 March 2026

What is CVE-2026-33911?

OpenEMR, a widely used electronic health records and medical management application, contains a vulnerability where the title POST parameter is reflected in a JSON response. Due to the incorrect handling of the Content-Type as text/html, browsers process any injected HTML or script tags, leading to potential unauthorized JavaScript execution in the context of authenticated user sessions. This could allow an attacker to manipulate user sessions or access sensitive information. The issue is resolved in version 8.0.0.3, emphasizing the importance of keeping software updated.

Affected Version(s)

openemr < 8.0.0.3

References

https://github.com/openemr/openemr/security/advisories/GH...
x_refsource_CONFIRM
https://github.com/openemr/openemr/commit/64e8befa0a49f85...
x_refsource_MISC
https://github.com/openemr/openemr/releases/tag/v8_0_0_3
x_refsource_MISC

CVSS V3.1

Score:
5.4
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
Required
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.