CVE-2026-4623Public exploitNetwork attack vector

Unauthenticated SSRF via unvalidated API URL

Published Mar 24, 2026 · Updated Mar 24, 2026

Server-side request forgery in DefaultFuction Customer Relationship Management System 1.0.0 allows remote attackers to access internal resources. The external_api action in /api/System.php passes the GET url parameter directly to sendCurlRequest without validation, protocol restrictions, or a destination allowlist. No authentication is required; the server returns the fetched response, exposing internal services and data reachable from the application host.

CVSS severity7.3
High
EPSS probability0.32%
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 DefaultFuction Customer Relationship Management System 1.0.0 allows remote attackers to access internal resources. The external_api action in /api/System.php passes the GET url parameter directly to sendCurlRequest without validation, protocol restrictions, or a destination allowlist. No authentication is required; the server returns the fetched response, exposing internal services and data reachable from the application host.

The record

CVE
CVE-2026-4623
Published
Mar 24, 2026
Updated
Mar 24, 2026
Vendor
DefaultFuction
Product
Customer Relationship Management System
Classifications
CWE-918, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 24, 2026Record 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=n/a

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

DefaultFuction · Customer Relationship Management Systemversion=n/a

Published CVSS scores

7.5VulDBAV:N/AC:L/Au:N/C:P/I:P/A:P
7.3VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
5.5VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

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-918Server-Side Request Forgery (SSRF)
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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