CVE-2023-34855Network attack vector

Browser script execution via crafted HTML upload

Published Jun 12, 2023 · Updated Jan 3, 2025

Cross-site scripting in Youxun AC Centralized Management Platform 1.02.040 allows attackers to execute script in a victim's browser. The /upfile.cgi interface accepts a crafted HTML upload that supplies active content for execution when the uploaded file is opened. High-privileged access is required to upload the file, and another user must open it; impact is limited to data exposed or altered in that browser context.

CVSS severity4.8
Medium
EPSS probability0.39%
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 Youxun AC Centralized Management Platform 1.02.040 allows attackers to execute script in a victim's browser. The /upfile.cgi interface accepts a crafted HTML upload that supplies active content for execution when the uploaded file is opened. High-privileged access is required to upload the file, and another user must open it; impact is limited to data exposed or altered in that browser context.

The record

CVE
CVE-2023-34855
Published
Jun 12, 2023
Updated
Jan 3, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 12, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 3, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

4.8NISTCVSS:3.1/AV:N/AC:L/PR:H/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.

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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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

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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