CVE-2021-38488Network attack vector

Authenticated JavaScript execution via API event comments

Published Nov 3, 2021 · Updated Sep 17, 2024

Stored cross-site scripting in Delta Electronics DIALink 1.2.4.0 and earlier allows remote authenticated users to execute JavaScript. The API events interface accepts arbitrary JavaScript in its comment parameter and fails to neutralize that input before rendering it as web content. High-privilege DIALink access is required, and successful exploitation executes script in the affected web context without interrupting service.

CVSS severity5.5
Medium
EPSS probability12.34%
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 Delta Electronics DIALink 1.2.4.0 and earlier allows remote authenticated users to execute JavaScript. The API events interface accepts arbitrary JavaScript in its comment parameter and fails to neutralize that input before rendering it as web content. High-privilege DIALink access is required, and successful exploitation executes script in the affected web context without interrupting service.

The record

CVE
CVE-2021-38488
Published
Nov 3, 2021
Updated
Sep 17, 2024
Vendor
Delta Electronics, Inc.
Product
DIALink
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Nov 3, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 2024Record 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=All <=1.2.4.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Delta Electronics, Inc. · DIALinkversion=All <=1.2.4.0

Published CVSS scores

4.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
3.5NIST NVDAV:N/AC:M/Au:S/C:N/I:P/A:N
5.5ICS-CERTCVSS:3.1/AV:N/AC:L/PR:H/UI:N/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 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')
T1059.007Command and Scripting Interpreter: JavaScript

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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