CVE-2022-4502Public exploitNetwork attack vector

Browser script execution via unescaped stage parameter

Published Dec 15, 2022 · Updated Apr 14, 2025

Reflected XSS in OpenEMR before 7.0.0.2 allows remote authenticated users to execute script in another user's browser via a crafted request. The messages module writes the stage request parameter into an HTML warning without output encoding when the value is nonnumeric. A low-privileged account and user interaction are required; successful exploitation exposes or modifies data accessible to the victim's browser session.

CVSS severity7.3
High
EPSS probability0.64%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in OpenEMR before 7.0.0.2 allows remote authenticated users to execute script in another user's browser via a crafted request. The messages module writes the stage request parameter into an HTML warning without output encoding when the value is nonnumeric. A low-privileged account and user interaction are required; successful exploitation exposes or modifies data accessible to the victim's browser session.

The record

CVE
CVE-2022-4502
Published
Dec 15, 2022
Updated
Apr 14, 2025
Vendor
OpenEMR Foundation
Product
OpenEMR
Classifications
CWE-79, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 15, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 14, 2025Record 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=unspecified <7.0.0.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

OpenEMR Foundation · OpenEMRversion=unspecified <7.0.0.2

Published CVSS scores

7.3huntr.devCVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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')
T1203Exploitation for Client Execution

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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