OpenEMR up to 8.1.x Fax SMS SignalWireClient.php Document::get_data information disclosure

Summaryinfo

A vulnerability has been found in OpenEMR up to 8.1.x and classified as problematic. Affected by this vulnerability is the function Document::get_data of the file interface/modules/custom_modules/oe-module-faxsms/src/Controller/SignalWireClient.php of the component Fax SMS Module. The manipulation leads to information disclosure. This vulnerability is documented as CVE-2026-65983. The attack can be initiated remotely. There is not any exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in OpenEMR up to 8.1.x. This issue affects the function Document::get_data of the file interface/modules/custom_modules/oe-module-faxsms/src/Controller/SignalWireClient.php of the component Fax SMS Module. The manipulation with an unknown input leads to a information disclosure vulnerability. Using CWE to declare the problem leads to CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. Impacted is confidentiality. The summary by CVE is:

OpenEMR is a free and open source electronic health records and medical practice management application. Prior to 8.2.0, interface/modules/custom_modules/oe-module-faxsms/src/Controller/SignalWireClient.php decrypts a selected patient document with Document::get_data() and SignalWireClient::uploadFileForFax() writes the plaintext bytes under sites/{siteId}/fax. The module returns the resulting public URL to SignalWire, protects it only with a predictable uniqid() filename, and never removes the staged file. An unauthenticated network actor who obtains or guesses the URL can retrieve persistent patient documents even when drive encryption is enabled. This issue is fixed in version 8.2.0.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-65983 since 07/23/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1592 according to MITRE ATT&CK.

By approaching the search of inurl:interface/modules/custom_modules/oe-module-faxsms/src/Controller/SignalWireClient.php it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 8.2.0 eliminates this vulnerability.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• Business Process Management Software

Name

• OpenEMR

Version

• 8.0
• 8.1

License

• open-source

Website

• Product: https://github.com/openemr/openemr/

CPE 2.3info

• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Discussion