SiteServer SSCMS through 7.4.0 contains an authorization bypass vulnerability in ChannelsController that allows site-scoped administrators to access other sites' channels by supplying foreign channel IDs. Attackers with Channels permission on one site can read and overwrite another site's channel names, file paths, templates, link URLs, and custom fields, breaking multi-site isolation.
History

Fri, 23 Oct 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 23 Oct 2026 03:30:00 +0000

Type Values Removed Values Added
First Time appeared Siteserver
Siteserver sscms
Vendors & Products Siteserver
Siteserver sscms

Fri, 16 Oct 2026 17:45:00 +0000

Type Values Removed Values Added
Description SiteServer SSCMS through 7.4.0 contains an authorization bypass vulnerability in ChannelsController that allows site-scoped administrators to access other sites' channels by supplying foreign channel IDs. Attackers with Channels permission on one site can read and overwrite another site's channel names, file paths, templates, link URLs, and custom fields, breaking multi-site isolation.
Title SiteServer SSCMS through 7.4.0 Cross-Site Authorization Bypass via Channels API
First Time appeared Sscms
Sscms sscms
Weaknesses CWE-639
CPEs cpe:2.3:a:sscms:sscms:*:*:*:*:*:*:*:*
Vendors & Products Sscms
Sscms sscms
References
Metrics cvssV3_1

{'score': 3.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N'}

cvssV4_0

{'score': 5.1, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published: 2026-10-16T17:39:23.461Z

Updated: 2026-10-23T15:58:20.254Z

Reserved: 2026-10-16T14:31:15.965Z

Link: CVE-2026-111658

cve-icon Vulnrichment

Updated: 2026-10-23T15:57:56.663Z

cve-icon NVD

Status : Deferred

Published: 2026-10-16T18:17:47.227

Modified: 2026-10-23T16:16:50.950

Link: CVE-2026-111658

cve-icon Redhat

No data.