CVE-2026-82486
Received Received - Intake

Improper Access Control in SiteServer SSCMS via SecurityKey Manipulation

Publication date: 2026-08-30

Last updated on: 2026-08-30

Assigner: VulDB

Description
A vulnerability was found in SiteServer SSCMS 7.4.0. Affected by this issue is some unknown functionality of the component Agent Installation Workflow. Performing a manipulation of the argument SecurityKey results in improper access controls. Remote exploitation of the attack is possible. The attack is considered to have high complexity. The exploitation is known to be difficult. The project was informed of the problem early through an issue report but has not responded yet.

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Meta Information

Published
2026-08-30
Last Modified
2026-08-30
Generated
2026-08-30
AI Q&A
2026-08-30
EPSS Evaluated
N/A
NVD
CVE-2026-82486
EUVD
EUVD-2026-68176

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
siteserver sscms 7.4.0

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-284 The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.
CWE-266 A product incorrectly assigns a privilege to a particular actor, creating an unintended sphere of control for that actor.

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Executive Summary

This vulnerability affects SiteServer SSCMS 7.4.0, where the SecurityKey used for authentication is exposed during installation and remains accessible afterward. The AgentController lacks proper authorization, relying only on a SecurityKey string comparison. Attackers can exploit this by obtaining the SecurityKey from the installation phase or configuration file to forge administrator JWT tokens and gain full system control.

Detection Guidance

Check for exposed SecurityKey during installation or in the sscms.json file. Monitor for unauthorized administrator account creation attempts. Inspect AgentController endpoints (/api/admin/agent/*) for missing authorization controls.

Impact Analysis

An attacker could exploit this to create an administrator account and gain full control of the SSCMS system. This could lead to unauthorized data access, modification, or deletion, compromising the integrity and confidentiality of the system and its data.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, violating confidentiality requirements in GDPR and HIPAA. Organizations using SSCMS 7.4.0 may face compliance violations, potential data breaches, and associated legal penalties due to insufficient access controls.

Mitigation Strategies

Immediately restrict access to the SecurityKey during installation. Implement class-level [Authorize] protection on AgentController endpoints. Rotate the SecurityKey used for JWT token signing and update all dependent systems.

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