CVE-2026-33934
MEDIUMCVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
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Description
OpenEMR is a free and open source electronic health records and medical practice management application. Versions prior to 8.0.0.3 have a missing authorization check in `portal/sign/lib/show-signature.php` that allows any authenticated patient portal user to retrieve the drawn signature image of any staff member by supplying an arbitrary `user` value in the POST body. The companion write endpoint (`save-signature.php`) was already hardened against this same issue, but the read endpoint was not updated to match. Version 8.0.0.3 patches the issue.
Analysis
OpenEMR contains a missing authorization check in the signature retrieval endpoint (portal/sign/lib/show-signature.php) that allows any authenticated patient portal user to access the drawn signature images of arbitrary staff members by manipulating the POST parameter. Versions prior to 8.0.0.3 are affected, and while the companion write endpoint was previously hardened against this issue, the read endpoint was left vulnerable. …
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Remediation
Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.
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