CVE-2026-33301Public exploitNetwork attack vector

Authenticated image disclosure via unescaped PDF form HTML

Published Mar 19, 2026 · Updated Mar 19, 2026

Improper output escaping in OpenEMR before 8.0.0.2 allows remote authenticated users to read server images through Eye Exam PDFs. interface/forms/eye_mag/report.php writes Eye Exam HPI and other answers into the report without text escaping, letting mPDF resolve attacker-supplied file URI image sources. Exploitation requires the OpenEMR encounter-notes permission and a patient encounter; the demonstrated result is disclosure of images readable by the server process.

CVSS severity7.1
High
EPSS probability0.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper output escaping in OpenEMR before 8.0.0.2 allows remote authenticated users to read server images through Eye Exam PDFs. interface/forms/eye_mag/report.php writes Eye Exam HPI and other answers into the report without text escaping, letting mPDF resolve attacker-supplied file URI image sources. Exploitation requires the OpenEMR encounter-notes permission and a patient encounter; the demonstrated result is disclosure of images readable by the server process.

The record

CVE
CVE-2026-33301
Published
Mar 19, 2026
Updated
Mar 19, 2026
Vendor
OpenEMR Foundation
Product
OpenEMR
Classifications
CWE-116, T1005
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 19, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 8.0.0.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

OpenEMR Foundation · OpenEMRversion=< 8.0.0.2

Published CVSS scores

7.1GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-116Improper Encoding or Escaping of Output
T1005Data from Local System

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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