CVE-2026-33145: CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') in neutrinolabs xrdp
CVE-2026-33145 is a medium severity vulnerability in neutrinolabs xrdp versions prior to 0. 10. 6. It allows an authenticated remote user to execute arbitrary OS commands on the server via unsafe handling of the AlternateShell parameter in xrdp-sesman. This occurs because the AlternateShell value is passed unsanitized to /bin/sh -c during session initialization when the AllowAlternateShell setting is enabled by default. The vulnerability enables command execution before the normal window manager starts, bypassing expected session restrictions. The issue has been fixed in version 0. 10. 6.
AI Analysis
Technical Summary
xrdp, an open source RDP server, versions before 0.10.6 contain an OS command injection vulnerability (CWE-78) due to improper neutralization of special elements in the AlternateShell parameter. When AllowAlternateShell is enabled (default), xrdp-sesman executes the client-supplied AlternateShell value via /bin/sh -c without sanitization during session startup. This allows an authenticated remote user to execute arbitrary commands on the server within their security context, bypassing normal session initialization controls. The vulnerability is addressed in xrdp version 0.10.6.
Potential Impact
An authenticated remote user can execute arbitrary OS commands on the server hosting xrdp prior to the normal desktop environment startup. This can lead to unauthorized command execution, potentially affecting confidentiality, integrity, and availability of the system. The CVSS 3.1 base score is 6.3 (medium severity), reflecting network attack vector with low complexity, requiring privileges and no user interaction.
Mitigation Recommendations
This vulnerability is fixed in xrdp version 0.10.6. Users should upgrade to version 0.10.6 or later to remediate this issue. Since the vendor advisory or patch links are not explicitly provided, confirm the upgrade availability from the official neutrinolabs xrdp project before applying. No other mitigations are specified.
CVE-2026-33145: CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') in neutrinolabs xrdp
Description
CVE-2026-33145 is a medium severity vulnerability in neutrinolabs xrdp versions prior to 0. 10. 6. It allows an authenticated remote user to execute arbitrary OS commands on the server via unsafe handling of the AlternateShell parameter in xrdp-sesman. This occurs because the AlternateShell value is passed unsanitized to /bin/sh -c during session initialization when the AllowAlternateShell setting is enabled by default. The vulnerability enables command execution before the normal window manager starts, bypassing expected session restrictions. The issue has been fixed in version 0. 10. 6.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
xrdp, an open source RDP server, versions before 0.10.6 contain an OS command injection vulnerability (CWE-78) due to improper neutralization of special elements in the AlternateShell parameter. When AllowAlternateShell is enabled (default), xrdp-sesman executes the client-supplied AlternateShell value via /bin/sh -c without sanitization during session startup. This allows an authenticated remote user to execute arbitrary commands on the server within their security context, bypassing normal session initialization controls. The vulnerability is addressed in xrdp version 0.10.6.
Potential Impact
An authenticated remote user can execute arbitrary OS commands on the server hosting xrdp prior to the normal desktop environment startup. This can lead to unauthorized command execution, potentially affecting confidentiality, integrity, and availability of the system. The CVSS 3.1 base score is 6.3 (medium severity), reflecting network attack vector with low complexity, requiring privileges and no user interaction.
Mitigation Recommendations
This vulnerability is fixed in xrdp version 0.10.6. Users should upgrade to version 0.10.6 or later to remediate this issue. Since the vendor advisory or patch links are not explicitly provided, confirm the upgrade availability from the official neutrinolabs xrdp project before applying. No other mitigations are specified.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-03-17T20:35:49.930Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69e29a32bdfbbecc598cc5d7
Added to database: 4/17/2026, 8:38:10 PM
Last enriched: 4/17/2026, 8:53:25 PM
Last updated: 4/17/2026, 9:50:40 PM
Views: 5
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