OpenEMR up to 8.2.9 Weno file_download.php removeWenoPharmacies cross-site request forgery

Summaryinfo

A vulnerability was found in OpenEMR up to 8.2.9. It has been classified as problematic. Impacted is the function PharmacyService::removeWenoPharmacies of the file interface/modules/custom_modules/oe-module-weno/scripts/file_download.php of the component Weno Module. Performing a manipulation results in cross-site request forgery. This vulnerability is reported as CVE-2026-103939. The attack is possible to be carried out remotely. No exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as problematic has been found in OpenEMR up to 8.2.9. This affects the function PharmacyService::removeWenoPharmacies of the file interface/modules/custom_modules/oe-module-weno/scripts/file_download.php of the component Weno Module. The manipulation with an unknown input leads to a cross-site request forgery vulnerability. CWE is classifying the issue as CWE-352. The web application does not, or cannot, sufficiently verify whether a request was intentionally provided by the user who sent the request, which could have originated from an unauthorized actor. This is going to have an impact on integrity. The summary by CVE is:

OpenEMR is a free and open source electronic health records and medical practice management application. Prior to 8.3.0, interface/modules/custom_modules/oe-module-weno/scripts/file_download.php has no ACL or CSRF check and ignores the result of validateAdminCredentials(). When the Weno module is enabled, the default GET path calls PharmacyService::removeWenoPharmacies() before attempting a refetch, allowing any authenticated user to truncate the weno_pharmacy table and allowing a cross-site request to trigger the same operation through a logged-in victim. A failed later download can leave the e-prescribing pharmacy directory empty and unavailable. This issue is fixed in version 8.3.0.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-103939 since 10/01/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit.

By approaching the search of inurl:interface/modules/custom_modules/oe-module-weno/scripts/file_download.php it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 8.3.0 eliminates this vulnerability.

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Productinfo

Type

• Business Process Management Software

Name

• OpenEMR

Version

• 8.2.0
• 8.2.1
• 8.2.2
• 8.2.3
• 8.2.4
• 8.2.5
• 8.2.6
• 8.2.7
• 8.2.8
• 8.2.9

License

• open-source

Website

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

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