Threat database

SiteServer SSCMS versions up to 7.4.0 have an authorization bypass vulnerability in the ChannelsController component. This flaw allows site-scoped administrators with Channels permission on one site to access and modify channels belonging to other sites by supplying foreign channel IDs. The vulnerability breaks multi-site isolation by permitting unauthorized reading and overwriting of channel names, file paths, templates, link URLs, and custom fields across sites.

CVE-2026-82486 is a vulnerability in SiteServer SSCMS version 7.4.0 involving improper access controls in the Agent Installation Workflow component. Manipulating the SecurityKey argument can lead to unauthorized access. Remote exploitation is possible but considered difficult due to high attack complexity. No patch or official remediation has been provided yet, and no known exploits are reported in the wild. The CVSS score is low, reflecting limited impact and difficulty of exploitation.

SSCMS v7.4.0 contains a SQL injection vulnerability in the stl:sqlContent tag where the queryString attribute is passed directly to database execution without parameterization or sanitization. Attackers can craft encrypted payloads submitted to the /api/stl/actions/dynamic endpoint to execute arbitrary SQL statements, leading to unauthorized database access, data disclosure, authentication bypass, data modification, or complete database compromise.

SSCMS v7.4.0 contains a reflected cross-site scripting vulnerability in the STL processing endpoint that allows attackers to execute arbitrary JavaScript by crafting malicious STL template payloads that are decrypted and returned without proper sanitization. Attackers can exploit improper output encoding in the /api/stl/actions/dynamic endpoint to inject executable JavaScript into JSON responses, leading to session hijacking, phishing attacks, and unauthorized actions performed on behalf of users.