CVE-2025-27693 Overview
CVE-2025-27693 is a stored cross-site scripting (XSS) vulnerability in Dell Wyse Management Suite versions prior to WMS 5.1. The flaw stems from improper neutralization of input during web page generation [CWE-79]. A remote attacker with high privileges can inject malicious script content into the management console. Successful exploitation requires user interaction from a victim who loads the affected page. The injected script executes in the victim's browser context, potentially altering displayed content or triggering client-side actions. Dell addressed this issue in security advisory DSA-2025-135.
Critical Impact
Authenticated high-privileged attackers can inject scripts into the Wyse Management Suite web interface, affecting confidentiality and integrity of other users' sessions.
Affected Products
- Dell Wyse Management Suite versions prior to WMS 5.1
Discovery Timeline
- 2025-04-02 - CVE-2025-27693 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-27693
Vulnerability Analysis
Dell Wyse Management Suite is a centralized platform for managing Wyse thin client devices. The application fails to properly neutralize user-supplied input before rendering it in generated web pages. An attacker who already possesses high-privileged access can submit crafted payloads containing HTML or JavaScript. When another user navigates to the affected page, the browser interprets the injected content as executable code.
The vulnerability requires user interaction and network access to the management interface. Exploitation impact is scoped as changed, meaning injected scripts can affect components beyond the vulnerable endpoint. Confidentiality and integrity impacts are limited, while availability remains unaffected.
Root Cause
The root cause is missing or insufficient output encoding when reflecting attacker-controlled input into HTML responses. The application accepts input through administrative interfaces without applying context-appropriate escaping. Standard defenses such as HTML entity encoding, attribute encoding, or Content Security Policy enforcement are absent or incomplete in the affected code paths.
Attack Vector
Exploitation begins with an authenticated administrator submitting crafted content through a management workflow. The payload persists or reflects within the web console. A second user, typically another administrator, loads the page and triggers script execution in their browser session. The attacker can then perform actions such as session data theft, unauthorized configuration changes on behalf of the victim, or redirection to attacker-controlled resources.
No verified public exploit code is available for this vulnerability. Refer to the Dell Security Advisory DSA-2025-135 for vendor-provided technical details.
Detection Methods for CVE-2025-27693
Indicators of Compromise
- Unexpected <script>, <iframe>, or event-handler attributes stored in Wyse Management Suite configuration fields, device names, or group descriptions.
- Administrative user sessions exhibiting unauthorized configuration changes or outbound requests to unfamiliar domains.
- Web server logs showing POST or PUT requests to management endpoints containing encoded script payloads such as %3Cscript%3E or javascript:.
Detection Strategies
- Review WMS audit logs for administrative actions performed outside expected change windows or by accounts not typically active.
- Inspect stored configuration objects and dashboards for HTML markup or JavaScript that should not be present in text fields.
- Correlate browser-side errors and Content Security Policy violation reports from administrator workstations accessing the WMS console.
Monitoring Recommendations
- Enable and forward WMS application logs to a centralized log platform for retention and query.
- Monitor egress traffic from administrator workstations for connections to uncategorized or newly registered domains initiated from browser sessions.
- Alert on modifications to WMS user accounts, role assignments, and policy objects, particularly those made shortly after console page loads.
How to Mitigate CVE-2025-27693
Immediate Actions Required
- Upgrade Dell Wyse Management Suite to version 5.1 or later as specified in DSA-2025-135.
- Audit existing WMS administrator accounts and remove accounts that do not require high-privilege access.
- Rotate credentials for all privileged WMS accounts after patching to invalidate any sessions that may have been abused.
Patch Information
Dell released a fix in Wyse Management Suite version 5.1. Patch details and download instructions are published in the Dell Security Advisory DSA-2025-135. Apply the update through standard Dell patching procedures and verify the installed build reports version 5.1 or higher.
Workarounds
- Restrict network access to the WMS management interface using firewall rules or network segmentation so only authorized administrative subnets can reach the console.
- Enforce least privilege by limiting the number of accounts with high-privileged roles until patching is complete.
- Require administrators to access the WMS console from dedicated privileged access workstations with hardened browser configurations.
# Example: restrict access to WMS console using iptables
iptables -A INPUT -p tcp --dport 443 -s 10.10.20.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
