Published:2015/06/30  Last Updated:2015/06/30

OpenEMR vulnerable to authentication bypass


OpenEMR contains an authentication bypass vulnerability.

Products Affected

  • OpenEMR 2.8.3 to 4.2.0 patch 1


OpenEMR is an electronic health records and medical practice management application. OpenEMR contains an authentication bypass vulnerability (CWE-302).


Sensitive information may be obtained by a remote attacker who can access the web interface of the product.


Update the software and apply the patch
This vulnerability has been addressed in OpenEMR 4.2.0 patch 2.
Update the software and then apply the patch according to the information provided by the developer.

Vendor Status


JPCERT/CC Addendum

Vulnerability Analysis by JPCERT/CC

Analyzed on 2015.06.30 (CVSS Base Metrics)

What is CVSS?

Measures Severity Description
Access Vector(AV) Local (L) Adjacent Network (A) Network (N) A vulnerability exploitable with network access means the vulnerable software is bound to the network stack and the attacker does not require local network access or local access. Such a vulnerability is often termed "remotely exploitable".
Access Complexity(AC) High (H) Medium (M) Low (L) Specialized access conditions or extenuating circumstances do not exist.
Authentication(Au) Multiple (M) Single (S) None (N) Authentication is not required to exploit the vulnerability.
Confidentiality Impact(C) None (N) Partial (P) Complete (C) There is considerable informational disclosure. Access to some system files is possible, but the attacker does not have control over what is obtained, or the scope of the loss is constrained.
Integrity Impact(I) None (N) Partial (P) Complete (C) There is no impact to the integrity of the system.
Availability Impact(A) None (N) Partial (P) Complete (C) There is no impact to the availability of the system.

Base Score:5.0


Shoji Baba reported this vulnerability to IPA.
JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.

Other Information

JPCERT Reports
CERT Advisory
CPNI Advisory
CVE CVE-2015-4453
JVN iPedia JVNDB-2015-000092