SiteServer SSCMS through 7.4.0 Cross-Site Authorization Bypass via Channels API
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.
CVE-2026-111658
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-111658
SSCMS
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://github.com/siteserver/cms",
"vendor": "SiteServer",
"product": "SSCMS",
"versions": [
{
"status": "affected",
"version": "0",
"versionType": "custom",
"lessThanOrEqual": "7.4.0"
}
],
"packageURL": "pkg:github/siteserver/cms",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-111658
Source reference:
/cveMetadata/cveId
Publisher severity
medium
Source reference: /containers/cna/metrics
- Event
- #53062 · Revision 1
- Added to Heist Feed
- Publisher date