Is this vulnerability remotely exploitable, or does it require local access?

It is remotely exploitable in typical deployments. Any attacker who can send HTTP requests to the exposed `/api/System.php` endpoint and control the `url` parameter can attempt SSRF, assuming no upstream network restrictions.

Does exploiting this SSRF issue require authentication?

That depends on how the API module is deployed and protected. If `/api/System.php` is accessible without authentication or with weak controls, unauthenticated attackers may exploit it. If strong authentication or IP-based access controls protect the endpoint, exploitation would generally require valid credentials or access to the trusted network.

What is the safest general fix pattern for this class of bug?

The most robust pattern is to avoid dereferencing user-supplied URLs altogether and instead map client-specified identifiers to a predefined set of permitted destinations. Where dynamic URLs are unavoidable, enforce strict allowlists and comprehensive URL validation (scheme, host, IP range), alongside network-layer egress controls.

Severity:

HIGH RISK

(7.3)

Server-Side Request Forgery (CWE-918) in Jeson CRM API Module (/api/System.php)

CVE-2026-4623

Published:

Mar 23, 2026

Status:

Awaiting Analysis

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

Recent Vulnerabilities

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

Remote Code Execution on the Router

April 6, 2026

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Remote Code Execution on Router Firmware

April 6, 2026

Vulnerability Type

Category:

Server-Side Request Forgery (SSRF)

CWE:

CWE-918

Impact:

Network Pivoting and Indirect Access to Internal Resources via SSRF

Severity:

HIGH RISK

(7.3)

CVSS Version:

3.1

Vulnerability Type

Category:

Server-Side Request Forgery (SSRF)

CWE:

CWE-918

Impact:

Network Pivoting and Indirect Access to Internal Resources via SSRF

Severity:

HIGH RISK

(7.3)

CVSS Version:

3.1

Catch This CVE While Code Is Being Written

Detect vulnerable code directly in pull requests, so CVEs are fixed before merge.

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Ask AI for summary of CodeAnt

Server-Side Request Forgery (CWE-918) in Jeson CRM API Module (/api/System.php)

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

Recent Vulnerabilities

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

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