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CVE-2026-7198 – Improper Access Control / Unauthenticated Full Compromise – Progress Sitefinity 1…

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Summary

CVE-2026-7198 is a critical Improper Access Control (CWE-284) vulnerability in the web services component of Progress Sitefinity CMS, affecting versions 15.4.8623 through 15.4.8629 and fixed in version 15.4.8630. A remote, unauthenticated attacker can exploit the flaw over the network to access content that should be restricted, resulting in full compromise of confidentiality, integrity, and availability of affected installations. With a CVSS v3.1 base score of 9.8 (Critical) and no authentication or user interaction required, this vulnerability represents one of the most severe access control failures possible for an internet-facing CMS platform.

Technical details

  • Root cause: Improper access control (CWE-284) in the web services layer of Sitefinity CMS; access restrictions on protected content and operations are not correctly enforced by the affected web services endpoint(s).
  • Trigger conditions: The vulnerability is exploitable via standard HTTP/HTTPS requests to the Sitefinity web services component — no special network position, credentials, or user interaction is required.
  • Attack vector: Network-reachable (AV:N), low attack complexity (AC:L), no privileges required (PR:N), no user interaction (UI:N). Any unauthenticated remote attacker with access to the Sitefinity web services interface can trigger the flaw.
  • Impact: Full compromise across all three security pillars — confidentiality (C:H), integrity (I:H), and availability (A:H). An attacker can read restricted content, manipulate data or site configuration, and disrupt service operations.

Affected software

  • Progress Sitefinity versions 15.4.8623 through 15.4.8629 (all builds in this range are affected)

Severity

  • CVSS v3.1 Base Score: 9.8 (Critical)
  • Vector String: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Mitigation and recommended actions

  • Immediate — Apply the vendor patch: Upgrade Progress Sitefinity to version 15.4.8630 or later, which contains the fix for this vulnerability. The patch is detailed in the Progress Software security advisory (see References).
  • If immediate patching is not possible: Restrict external network access to the Sitefinity web services endpoints at the perimeter (firewall or WAF rules) to limit exposure until the patch can be applied. Treat any Sitefinity instance in the affected version range as potentially compromised and review access logs for unauthorized activity.

IONIX Status

The IONIX research team is tracking ongoing exploitation attempts and recommends immediate patching. Potentially affected assets are outlined in this post.

References

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