CVE-2023-2521Network attack vector

Authenticated reflected XSS via url parameter

Published May 4, 2023 · Updated Jan 29, 2025

Cross-site scripting in NEXTU NEXT-7004N 3.0.1 allows remote authenticated users to alter rendered pages through a crafted url parameter. The POST handler at /boafrm/formFilter inserts the url argument into web output without neutralizing markup, so an SVG onload payload executes when the response is rendered. Access requires a low-privilege account and a victim to load the affected page; the documented impact is integrity modification without service interruption.

CVSS severity3.5
Low
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in NEXTU NEXT-7004N 3.0.1 allows remote authenticated users to alter rendered pages through a crafted url parameter. The POST handler at /boafrm/formFilter inserts the url argument into web output without neutralizing markup, so an SVG onload payload executes when the response is rendered. Access requires a low-privilege account and a victim to load the affected page; the documented impact is integrity modification without service interruption.

The record

CVE
CVE-2023-2521
Published
May 4, 2023
Updated
Jan 29, 2025
Vendor
EZ-NET Ubiquitous Co., Ltd.
Product
NEXT-7004N
Classifications
CWE-79, T1189
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 4, 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=3.0.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

EZ-NET Ubiquitous Co., Ltd. · NEXT-7004Nversion=3.0.1

Published CVSS scores

6.1CISA ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
3.5VulDB CNACVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N
4.0VulDB CNAAV:N/AC:L/Au:S/C:N/I:P/A:N
3.5VulDB CNACVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:N/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 exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1189Drive-by Compromise

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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