CVE-2025-44594Network attack vector

Internal resource disclosure via unrestricted remote upload

Published Sep 9, 2025 · Updated Sep 10, 2025

Server-side request forgery in Halo 2.24.0 and earlier allows remote authenticated users to retrieve internal resources via remote upload. The UC attachment upload-from-url path fetches a supplied URL without blocking loopback, private, link-local, multicast, unspecified, or IPv6 ULA destinations, then stores the response as an attachment. Exploitation requires the UC attachment-management permission and exposes only data reachable by the Halo server, with no reported service interruption.

CVSS severity6.5
Medium
EPSS probability0.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Server-side request forgery in Halo 2.24.0 and earlier allows remote authenticated users to retrieve internal resources via remote upload. The UC attachment upload-from-url path fetches a supplied URL without blocking loopback, private, link-local, multicast, unspecified, or IPv6 ULA destinations, then stores the response as an attachment. Exploitation requires the UC attachment-management permission and exposes only data reachable by the Halo server, with no reported service interruption.

The record

CVE
CVE-2025-44594
Published
Sep 9, 2025
Updated
Sep 10, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-918, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 9, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 10, 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

9.1CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
6.5HaloCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/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-918Server-Side Request Forgery (SSRF)
T1190Exploit Public-Facing Application

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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