CVE-2020-13166
The management tool in MyLittleAdmin 3.8 allows remote attackers to execute arbitrary code...
The management tool in MyLittleAdmin 3.8 allows remote attackers to execute arbitrary code because machineKey is hardcoded (the same for all customers' installations) in web.config, and can be used to send serialized ASP code.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
The management tool in MyLittleAdmin 3.8 allows remote attackers to execute arbitrary code because machineKey is hardcoded (the same for all customers' installations) in web.config, and can be used to send serialized ASP code.
- Record
CVE-2020-13166- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 7.5 High
AV:N/AC:L/Au:N/C:P/I:P/A:P - Weakness
- CWE-798
- Updated
- 2026-11-02
CVE List No score
The management tool in MyLittleAdmin 3.8 allows remote attackers to execute arbitrary code because machineKey is hardcoded (the same for all customers' installations) in web.config, and can be used to send serialized ASP code.
- Record
CVE-2020-13166- Updated
- 2026-11-02
EUVDEUVD-2020-5438 No score
The management tool in MyLittleAdmin 3.8 allows remote attackers to execute arbitrary code because machineKey is hardcoded (the same for all customers' installations) in web.config, and can be used to send serialized ASP code.
- Record
EUVD-2020-5438- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-hrgv-3gf4-fvpc
The management tool in MyLittleAdmin 3.8 allows remote attackers to execute arbitrary code...
The management tool in MyLittleAdmin 3.8 allows remote attackers to execute arbitrary code because machineKey is hardcoded (the same for all customers' installations) in web.config, and can be used to send serialized ASP code.
- Record
GHSA-hrgv-3gf4-fvpc- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-20, CWE-798
- Updated
- 2026-11-02
Affected products
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| Exploit-DB | Plesk/myLittleAdmin - ViewState .NET Deserialization (Metasploit) | 2020-05-25 |
| Metasploit | Plesk/myLittleAdmin ViewState .NET Deserialization | 2020-05-15 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, Exploit-DB, GitHub Advisories, Metasploit, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2020-13166 is a critical vulnerability (CVSS 9.8) in Mylittletools Mylittleadmin, published May 19, 2020. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 77.6%, the 99th percentile. No source names a fixed version.