Description

Dell SCG 5.0 Appliance versions prior to 5.36.00.16 and Dell SCG 5.0 Application versions prior to 5.36.00.00, contains an Improper Encoding or Escaping of Output vulnerability. An unauthenticated attacker with remote access could potentially exploit this vulnerability, leading to launch of phishing attacks.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "5.3",
  "pubDate": "2026-09-09T14:17:18.293Z",
  "pubdate": "2026-09-09T14:17:18.293Z",
  "executiveSummary": "Dell Secure Connect Gateway (SCG) 5.0 is susceptible to an Improper Encoding or Escaping of Output vulnerability. This security flaw exists in both the SCG 5.0 Appliance (versions prior to 5.36.00.16) and the SCG 5.0 Application (versions prior to 5.36.00.00).\nThe vulnerability arises from the failure of the application to properly sanitize or encode user-supplied data before rendering it in the browser, potentially allowing for cross-site scripting (XSS) scenarios. An unauthenticated remote attacker can leverage this flaw to inject malicious scripts into the web interface of the appliance.\nThe primary risk implication is the facilitation of phishing attacks. By manipulating the application output, an attacker can deceive users into disclosing sensitive information or performing unauthorized actions. Exploitation requires no prior authentication, significantly lowering the barrier for entry for malicious actors. Given the nature of SCG appliances in managing infrastructure connectivity, successful exploitation could lead to compromised administrative sessions and broader security infrastructure degradation.",
  "technicalDetails": "The core of the vulnerability lies in the application's failure to sanitize output streams properly. When the Dell SCG web interface reflects unauthenticated, user-controlled input back to the browser without adequate context-aware encoding or character escaping, the browser may interpret the input as executable code rather than plain text.\nSpecifically, the application fails to enforce secure output handling mechanisms that prevent the browser from executing injected HTML or JavaScript payloads. Because this flaw exists in the web-based management layer, it is exposed to any remote user capable of reaching the SCG interface.\nThe attack flow typically follows these stages: First, an unauthenticated attacker identifies a request parameter or input field within the SCG web interface that is reflected in the application's responses. Second, the attacker crafts a malicious payload containing JavaScript, HTML, or other active content. Third, the attacker initiates a request to the SCG server, embedding the malicious payload within the targeted parameter. Fourth, when a legitimate user—such as an administrator—accesses the affected page or triggers the reflection, the application renders the unencoded malicious payload.\nUpon execution, the script runs within the context of the user's browser session. The impact is significant: the injected script can capture session cookies, hijack administrative authentication tokens, redirect the user to malicious external domains, or perform unauthorized actions on behalf of the user within the SCG console. Because the application handles sensitive infrastructure management tasks, the potential for an attacker to escalate this client-side compromise into further internal reconnaissance or configuration tampering is high.\nThe vulnerability affects Dell SCG 5.0 Appliance versions before 5.36.00.16 and Dell SCG 5.0 Application versions before 5.36.00.00. The absence of authentication requirements means that any attacker with network connectivity to the appliance's management interface can initiate an exploitation attempt. No elevated privileges are required for the initial payload injection; however, the impact is magnified if the target user possesses administrative or high-level access rights to the SCG management console. The lack of strict content security policies (CSP) or improper MIME-type handling on the vulnerable pages likely contributes to the ease of execution for these injected payloads."
}