Vulnerability Details
Basic Information
| Title | CVE-2025-3935 ScreenConnect Exposure to ASP.NET ViewState Code Injection |
|---|---|
| Type | vulnrichment |
| Published | 2025-04-25T18:27:44 |
| Last Seen | 2025-04-25T19:27:01 |
| CVSS Score | 8.1 (HIGH) |
CVSS v3 Details
| Attack Vector | NETWORK |
|---|---|
| Attack Complexity | HIGH |
| Privileges Required | NONE |
| User Interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality Impact | HIGH |
| Integrity Impact | HIGH |
| Availability Impact | HIGH |
CVE Information
| CVE IDs | CVE-2025-3935 |
|---|---|
| CWE | CWE-287 |
| Bulletin Family | cve |
Description
ScreenConnect versions 25.2.3 and earlier versions may be susceptible to a ViewState code injection attack. ASP.NET Web Forms use ViewState to preserve page and control state, with data encoded using Base64 protected by machine keys.
It is important to note that to obtain these machine keys, privileged system level access must be obtained.
It is important to note that to obtain these machine keys, privileged system level access must be obtained.
If these machine keys are compromised, attackers could create and send a malicious ViewState to the website, potentially leading to remote code execution on the server.
The risk does not originate from a vulnerability introduced by ScreenConnect, but from platform level behavior. This had no direct impact to ScreenConnect Client. ScreenConnect 2025.4 patch disables ViewState and removes any dependency on it.
Impact Assessment
| Base Score | 8.1 |
|---|---|
| Severity | HIGH |