CVE-2020-13166 in the critical feed json
The management tool in MyLittleAdmin 3.8 allows remote attackers to execute arbitrary code because machineKey is hardcoded (the same for al…
published 2020-05-19 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-5438
- cvss
- 9.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 77.6%
- EPSS 77.6% chance of exploitation in 30 days, percentile 99.5%
- public exploits
- 2
- Metasploit, Exploit-DB
Summary
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.
Timeline
- First public exploit (Metasploit exploit/windows/http/plesk_mylittleadmin_viewstate)
- Published
Exploit prediction
77.64% chance of exploitation in the next 30 days, higher than 99.5% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- Metasploit exploit/windows/http/plesk_mylittleadmin_viewstate Plesk/myLittleAdmin ViewState .NET Deserialization metasploit exploit, excellent rank, 2020-05-15
- EDB-48513 Plesk/myLittleAdmin - ViewState .NET Deserialization (Metasploit) remote, 2020-05-25
- ssd-disclosure.com https://ssd-disclosure.com/ssd-advisory-mylittleadmin-preauth-rce/ referenced PoC, tagged "exploit" by a source, unverified
- packetstormsecurity.com http://packetstormsecurity.com/files/157808/Plesk-myLittleAdmin-ViewState-.NET-Deserialization.html referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
Classification
- Weakness
-
- CWE-798 Use of Hard-coded Credentials
References
-
ssd-disclosure.com
/ssd-advisory-mylittleadmin-preauth-rce/
exploit, third-party-advisory
-
packetstormsecurity.com
/files/157808/Plesk-myLittleAdmin-ViewState-.NET-Deserialization.html
exploit, third-party-advisory, vdb-entry
Sources
- CVE List CVE-2020-13166
- NVD CVE-2020-13166
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.