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Medium

SiteServer SSCMS through 7.4.0 Cross-Site Authorization Bypass via Channels API

Type: advisorySource: Official CVE List1 source record

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.

Announced Source revision 1
Original source ↗

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
Read the original announcement