CVE-2026-7198: Progress Sitefinity Auth Bypass Flaw

CVE-2026-7198 Overview

CVE-2026-7198 is an improper access control vulnerability [CWE-284] in the web services component of Progress Sitefinity. The flaw affects versions 15.4.8623 through versions prior to 15.4.8630. A remote unauthenticated attacker can access restricted content over the network without user interaction. Successful exploitation results in full compromise of confidentiality, integrity, and availability of affected installations. Progress published a security advisory addressing this issue alongside several related CVEs in May 2026.

Critical Impact

Unauthenticated remote attackers can bypass access controls on Sitefinity web services to reach restricted content and fully compromise affected installations.

Affected Products

• Progress Sitefinity 15.4.8623
• Progress Sitefinity versions before 15.4.8630
• Sitefinity deployments exposing web services to untrusted networks

Discovery Timeline

• 2026-06-02 - CVE-2026-7198 published to NVD
• 2026-06-04 - Last updated in NVD database

Technical Details for CVE-2026-7198

Vulnerability Analysis

The vulnerability resides in the web services layer of Progress Sitefinity, a .NET-based content management and digital experience platform. The affected endpoints fail to properly enforce access control checks before returning resources. As a result, requests that should be rejected for unauthenticated callers are processed and serviced. An attacker reaching the application over the network can interact with restricted functionality directly. The advisory describes the impact as full compromise of confidentiality, integrity, and availability, indicating the exposed services include privileged operations beyond simple data reads.

Root Cause

The root cause is missing or incomplete authorization enforcement on one or more web service endpoints, classified under [CWE-284] Improper Access Control. The application relies on implicit assumptions about caller identity or trusts client-supplied state. Authorization checks are either absent or are evaluated after sensitive operations occur. Progress addressed the issue in build 15.4.8630 by tightening access control on the affected web services.

Attack Vector

Exploitation requires only network access to the Sitefinity application. No credentials, prior access, or user interaction are needed. An attacker crafts HTTP requests targeting the vulnerable web service endpoints and receives data or executes operations that should require authentication or higher privilege. Because Sitefinity deployments are typically internet-facing CMS instances, exposed installations are reachable directly from the public internet. Specific endpoint paths and request structures have not been publicly disclosed, and Progress' advisory restricts technical detail to limit weaponization.

No public proof-of-concept is currently available. Refer to the Progress Sitefinity Security Advisory for vendor guidance.

Detection Methods for CVE-2026-7198

Indicators of Compromise

• Unauthenticated HTTP requests to Sitefinity web service endpoints under paths such as /RestApi/, /Sitefinity/Services/, or /api/ that return 200 OK with sensitive payloads.
• Anomalous outbound data volumes from the Sitefinity web server following inbound requests from unfamiliar source IPs.
• New or modified administrative content, users, or configuration entries without corresponding authenticated session activity in IIS logs.

Detection Strategies

• Review IIS and Sitefinity application logs for requests to web service endpoints that lack an authenticated session identifier or Authorization header but receive successful responses.
• Baseline normal web service traffic patterns and alert on spikes in request volume or unusual user-agent strings hitting service routes.
• Correlate Sitefinity audit logs with web server logs to identify content or configuration changes that cannot be attributed to a known administrative session.

Monitoring Recommendations

• Enable verbose request logging on the Sitefinity web tier and forward logs to a centralized analytics platform for retention and search.
• Deploy a web application firewall in front of Sitefinity with rules that flag direct access to internal service endpoints from external networks.
• Monitor for the installed Sitefinity build version across the estate and alert on any host running 15.4.8623 or any version below 15.4.8630.

How to Mitigate CVE-2026-7198

Immediate Actions Required

• Upgrade all Progress Sitefinity installations to version 15.4.8630 or later as specified in the vendor advisory.
• Inventory all Sitefinity instances, including non-production and staging environments, and confirm the build number of each.
• Restrict network access to Sitefinity administrative and web service endpoints to trusted source ranges until patching is complete.

Patch Information

Progress released a fixed build, Sitefinity 15.4.8630, that addresses CVE-2026-7198. The fix is documented in the Progress Sitefinity Security Advisory, which also covers CVE-2026-7312, CVE-2026-7195, CVE-2026-7201, and CVE-2026-7313. Customers should follow the standard Sitefinity upgrade procedure and validate functionality in a staging environment before production rollout.

Workarounds

• Block external access to Sitefinity web service paths at the perimeter firewall or reverse proxy until the upgrade is applied.
• Place the application behind an authenticating reverse proxy that rejects unauthenticated requests to service endpoints.
• Increase logging verbosity and review access logs daily for indicators of probing against web service routes.

# Example: restrict access to Sitefinity web service paths at an Nginx reverse proxy
location ~* ^/(RestApi|Sitefinity/Services|api)/ {
    allow 10.0.0.0/8;
    allow 192.168.0.0/16;
    deny all;
    proxy_pass http://sitefinity_backend;
}