CVE-2023-2566Network attack vector

Stored XSS via incomplete JavaScript scheme stripping

Published May 8, 2023 · Updated Jan 29, 2025

Stored cross-site scripting in OpenEMR before 7.0.1 allows remote authenticated users to execute JavaScript in another user's browser. The javascriptStringRemove function performs only one case-insensitive deletion of “javascript” from link-bound input, allowing nested instances to re-form the scheme. Exploitation requires high-privileged access to store the crafted link and user interaction to open it, exposing or altering browser-session data.

CVSS severity7.5
High
EPSS probability0.53%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored cross-site scripting in OpenEMR before 7.0.1 allows remote authenticated users to execute JavaScript in another user's browser. The javascriptStringRemove function performs only one case-insensitive deletion of “javascript” from link-bound input, allowing nested instances to re-form the scheme. Exploitation requires high-privileged access to store the crafted link and user interaction to open it, exposing or altering browser-session data.

The record

CVE
CVE-2023-2566
Published
May 8, 2023
Updated
Jan 29, 2025
Vendor
OpenEMR Foundation
Product
OpenEMR
Classifications
CWE-79
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. May 8, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 29, 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 <7.0.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

OpenEMR Foundation · OpenEMRversion=unspecified <7.0.1

Published CVSS scores

4.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
7.5huntr.devCVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:L/A:L

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Public exploit references

No public exploit references are available in this record.

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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