Possible Kentico Xperience Staging Sync Authentication Bypass via SyncServer Endpoint (via webserver)

PremiumReviewedSigma · Medium · v1
Category
webserver
Author
HuntRule
Published
2026-05-06
Updated
2026-08-28

ATT&CK techniques

Initial Access
  1. Recon

  2. Resource Dev

  3. Execution

  4. Persistence

  5. Priv Esc

  6. Defense Evasion

  7. Cred Access

  8. Discovery

  9. Lateral Movement

  10. Collection

  11. C2

  12. Exfiltration

  13. Impact

What it detects

This rule detects requests to the Kentico Xperience staging synchronization web service which is abused in the pre-auth RCE chain to upload objects after a password digest authentication bypass. Access to this SOAP endpoint from untrusted sources should be reviewed.

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Possible Kentico Xperience Staging Sync Authentication Bypass via SyncServer Endpoint (via webserver)
Pivot detection · T1190 · 9 related

Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.