What’s Vulnerable › Vulnerabilities

CVE-2026-33933: Reflected XSS via Unescaped contextName Parameter in Custom Template Editor

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-03-26 · updated 2026-06-17
• Weakness: CWE-79

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.

Affected products

• openemr: from 7.0.2.1 before 8.0.0.3 — fixed in 8.0.0.3

How to fix

Upgrade to a fixed version: openemr 8.0.0.3. Check the vendor advisory for mitigations.

References

• https://github.com/openemr/openemr/commit/d5c8d49ef19983472b2d7db0dbebd2dac9d6a200
• https://github.com/openemr/openemr/commit/de9b6eb0da574430e8223c014cf4a05b0adc29d8
• https://github.com/openemr/openemr/releases/tag/v8_0_0_3
• https://github.com/openemr/openemr/security/advisories/GHSA-9qh7-cfq4-j7c3
• https://github.com/openemr/openemr/security/advisories/GHSA-9qh7-cfq4-j7c3

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