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CVE-2026-48707 Details

ANALYZED

This CVE record has been analyzed and enriched by NVDAPI.com as an independent party.

Description

InstantCMS is a free and open source content management system. Versions prior to 2.18.2 have a Server-Side Request Forgery (SSRF) vulnerability in the file upload functionality (`system/core/uploader.php` at lines 509-532). When the "upload from URL" feature follows an HTTP redirect, the redirected target URL bypasses the private IP address blacklist check. This allows authenticated users to scan and access internal network services. Version 2.18.2 contains a fix.

Metrics

CVSS 3.x Severity and Vector Strings:

VolerionCVSS-B:6.4 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:L

CNA: [email protected]CVSS-B:3.1 LOWVector:CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/instantsoft/icms2/security/advisories/GHSA-cm47-mwv3-f534	CISA-ADP	AdvisoryExploitRemedyVendor
https://github.com/instantsoft/icms2/commit/04b8fe0eb75fc5f44eecb15684c7d3660586683d	[email protected]	Source CodeVendor
https://github.com/instantsoft/icms2/security/advisories/GHSA-cm47-mwv3-f534	[email protected]	AdvisoryExploitRemedyVendor

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-918	Server-Side Request Forgery (SSRF)	[email protected]

Affected Products

Product	Versions
InstantCMS	< 2.16.2 (semver)
CPE cpe:2.3:a:instantcms:instantcms:::::::: Remediation Upgrade: 2.18.2moderate effort

Change History

2 change records found show changes

Date	Action	Recorded By
Sep 11, 2026	CVE Modified	CISA-ADP
Sep 8, 2026	New CVE Received	[email protected]