CVE-2026-33348Public exploitNetwork attack vector

Stored XSS via unencoded Eye Exam answers

Published Mar 25, 2026 · Updated Mar 25, 2026

Stored XSS in OpenEMR before 8.0.0.3 allows attackers to execute JavaScript in an authenticated browser session. Eye Exam report.php renders stored CHRONIC2 and CHRONIC3 form values directly into encounter and visit-history HTML without text encoding. Exploitation requires an authenticated account with encounter-notes permission to store a payload and a victim to view the affected encounter or history, exposing session data and accessible patient records.

CVSS severity8.7
High
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in OpenEMR before 8.0.0.3 allows attackers to execute JavaScript in an authenticated browser session. Eye Exam report.php renders stored CHRONIC2 and CHRONIC3 form values directly into encounter and visit-history HTML without text encoding. Exploitation requires an authenticated account with encounter-notes permission to store a payload and a victim to view the affected encounter or history, exposing session data and accessible patient records.

The record

CVE
CVE-2026-33348
Published
Mar 25, 2026
Updated
Mar 25, 2026
Vendor
OpenEMR Foundation
Product
OpenEMR
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 25, 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=< 8.0.0.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

OpenEMR Foundation · OpenEMRversion=< 8.0.0.3

Published CVSS scores

8.7GitHubCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A: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-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript/JScript

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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