MEDIUM 5.1 NVD
CVE-2026-111658
SiteServer SSCMS through 7.4.0 contains an authorization bypass vulnerability in ChannelsController that allows site-scoped administrators to access other sites
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.
References
- https://github.com/siteserver/cms/blob/sscms-v7.2.1/src/SSCMS.Web/Controllers/Admin/Cms/Ch
- https://github.com/siteserver/cms/blob/sscms-v7.2.1/src/SSCMS.Web/Controllers/Admin/Cms/Ch
- https://hackmd.io/@hieuPenguinnn/sscms-cross-site-channel-idor
- https://www.vulncheck.com/advisories/siteserver-sscms-through-7.4.0-cross-site-authorizati
This medium severity vulnerability with a CVSS score of 5.1 was published on 2026-10-16 via NVD.
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