November 14, 2026

CVE Watchtower

CVE-2026-111658SiteServer SSCMS Authorization Bypass Through User-Controlled Key

NVD

Vulnerability Summary

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.
Severity Level
MEDIUM(5.1)
Published Date
Oct 16, 2026
Last Modified
Oct 23, 2026
Exploitation Status
No confirmed exploitation yet
EPSS Score (30-Day)
0.33%Probability
Root Weakness (CWE)
CWE-639: Authorization Bypass Through User-Controlled Key ↗
The system does not prevent one user from accessing another user data or record by modifying the key value identifying the data.
CVSS v4.0 Base Metrics — Score 5.1 (MEDIUM)
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
Attack VectorNetwork
Attack ComplexityLow
Attack RequirementsNone
Privileges RequiredHigh
User InteractionNone
Confidentiality (Vulnerable System)Low
Integrity (Vulnerable System)Low
Availability (Vulnerable System)None
Confidentiality (Subsequent System)None
Integrity (Subsequent System)None
Availability (Subsequent System)None
Show CVSS v3.x metrics (score 3.8)
CVSS v3.1 Base Metrics — Score 3.8 (LOW)
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredHigh
User InteractionNone
ScopeUnchanged
ConfidentialityLow
IntegrityLow
AvailabilityNone

Affected & Patched Versions

Affected Versions
  • SiteServer SSCMS <= 7.4.0
Patched Versions
  • SiteServer SSCMS 7.4.0

What to do

Fix it during your normal patch cycle. No exploitation is confirmed yet.

  1. Check whether you run SiteServer SSCMS and which version.
  2. Update to a patched version listed above, then confirm the new version.

Timeline

  • Oct 16, 2026Published
  • Oct 23, 2026Record last modified

Score, severity and exploitation changes are tracked from the day Watchtower started logging them.

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External References

Data last checked: Nov 14, 2026 01:09 UTC