CVE-2023-49230Public exploitNetwork attack vector

Unauthenticated portal modification via unchecked upload handler

Published Dec 28, 2023 · Updated Aug 2, 2024

Missing authorization in Peplink Balance Two before 8.4.0 allows remote attackers to alter captive portal configurations without authentication. The /guest/portal_admin_upload.cgi handler accepts an unauthenticated multipart request and writes attacker-supplied data to the portal selected by portal_id. An administrator must approve the pending changes before injected script runs in portal users’ browsers, where it can steal credentials.

CVSS severity8.8
High
EPSS probability2.05%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in Peplink Balance Two before 8.4.0 allows remote attackers to alter captive portal configurations without authentication. The /guest/portal_admin_upload.cgi handler accepts an unauthenticated multipart request and writes attacker-supplied data to the portal selected by portal_id. An administrator must approve the pending changes before injected script runs in portal users’ browsers, where it can steal credentials.

The record

CVE
CVE-2023-49230
Published
Dec 28, 2023
Updated
Aug 2, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-862, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 28, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-862Missing Authorization
T1190Exploit Public-Facing Application

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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