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Sinema Remote Connect ServerApplication · Siemens

CVE-2020-25240

HIGH · 8.8 CVSS v3.1 Published 2021-03-15
Fix available
A fix is available. Upgrade to 3.0 or later.
See remediation →
94/100
Remediation priority · Urgent
Remotely reachable Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
A vulnerability has been identified in SINEMA Remote Connect Server (All versions < V3.0). Unpriviledged users can access services when guessing the url. An attacker could impact availability, integrity and gain information from logs and templates of the service.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · moderate confidence

SINEMA Remote Connect Server versions before V3.0 contain an improper authorization vulnerability where unprivileged users can access restricted services by guessing URL paths. This allows attackers to read logs and templates (confidentiality impact), potentially modify service configuration (integrity impact), and disrupt service availability.

MitigationUpgrade SINEMA Remote Connect Server to version V3.0 or later to address the authorization bypass. If immediate upgrade is not possible, implement URL access controls and monitor for suspicious URL patterns in logs.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Sinema Remote Connect ServerApplication
Affected:< 3.0

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify if SINEMA Remote Connect Server is installed
    Locate the installation directory or check system inventory for Siemens SINEMA Remote Connect Server software. Common installation paths may include C:\Program Files\Siemens\SINEMA Remote Connect or /opt/sinema/remote_connect. Use system inventory tools or check installed programs list.
    Affected if SINEMA Remote Connect Server is present on the system
  2. Determine installed version
    Locate version information in the installation directory, typically in an About dialog, version.txt, or within application metadata. Check the main executable properties or configuration files for the version string.
    Affected if Installed version is before V3.0 (e.g., V2.x, V1.x) or version cannot be determined as V3.0 or later
  3. Check for exposed web interface
    Identify if the SINEMA Remote Connect web interface is accessible externally or on the network. Check firewall rules, reverse proxy configurations, or IIS/Apache bindings that expose the web port (default often 8443 or 443).
    Affected if Web interface is network-accessible beyond trusted administrative networks
  4. Review access logs for suspicious URL patterns
    Examine SINEMA Remote Connect Server logs for unusual or guessed URL paths that fall outside normal administrative access patterns. Look for requests to paths like /logs/, /templates/, /config/, or /backup/ that may indicate unauthorized access attempts.

The environment is affected if SINEMA Remote Connect Server is installed with a version before V3.0 and the web interface is accessible on the network.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 3.0 or later
Fixed in 3.0
Interim mitigation

Upgrade SINEMA Remote Connect Server to version V3.0 or later to address the authorization bypass. If immediate upgrade is not possible, implement URL access controls and monitor for suspicious URL patterns in logs.

Recommended fix High confidence

Upgrade to SINEMA Remote Connect Server V3.0 or later

  1. 1. Identify the current version of SINEMA Remote Connect Server by accessing the server administration interface or checking the installed software version
  2. 2. Plan a maintenance window for the upgrade process
  3. 3. Create a complete backup of the current configuration, including all settings, user data, and certificates
  4. 4. Download the latest version (V3.0 or later) of SINEMA Remote Connect Server from the official Siemens download portal (cert-portal.siemens.com)
  5. 5. Stop all services running on the SINEMA Remote Connect Server
  6. 6. Install the upgrade to version 3.0 or later following the Siemens upgrade documentation
  7. 7. Restore the configuration from the backup created in step 3
  8. 8. Restart the services and verify the application is running correctly
Caveat Review Siemens release notes for V3.0 to check for any configuration changes or features that may require adjustments

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Sinema Remote Connect Server Scoped from the published advisory
  • Consultation2.0 h
  • Implementation4.0 h
  • Testing2.0 h
  • Review / QA1.0 h
9.0 hours of engineering $1,600
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2020-25240 in production — separate from our analysis above.

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
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