CVE-2021-39392
Last modified
CVE-2021-39392 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. The management tool in MyLittleBackup up to and including 1.7 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.. EPSS estimates a 2.19% chance of exploitation in the next 30 days.
Description
The management tool in MyLittleBackup up to and including 1.7 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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Mylittletools | Mylittlebackup | <= 1.7 |
References
- https://gist.github.com/omriinbar/65827626e63f15e3e50557e2d9d61281Third Party Advisory
- https://gist.github.com/omriinbar/65827626e63f15e3e50557e2d9d61281Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-39392?
How severe is CVE-2021-39392?
How do I fix CVE-2021-39392?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2021
- CVE-2021-3938snipe-it is vulnerable to Improper Neutralization of Input D…5.4
- CVE-2021-39383DWSurvey v3.2.0 was discovered to contain a remote command e…9.8
- CVE-2021-39384DWSurvey v3.2.0 was discovered to contain an arbitrary file …9.8
- CVE-2021-3939Ubuntu-specific modifications to accountsservice (in patch f…7.8
- CVE-2021-39390Stored XSS in PartKeepr 1.4.0 Edit section in multiple api e…5.4
- CVE-2021-39391Cross Site Scripting (XSS) vulnerability exists in the admin…6.1
- CVE-2021-39393mm-wiki v0.2.1 was discovered to contain a cross-site script…6.1
- CVE-2021-39394mm-wiki v0.2.1 was discovered to contain a Cross-Site Reques…6.5
- CVE-2021-3940Rejected reason: DO NOT USE THIS CANDIDATE NUMBER. ConsultID…
- CVE-2021-39402MaianAffiliate v.1.0 is suffers from code injection by addin…7.2
- CVE-2021-39404MaianAffiliate v1.0 allows an authenticated administrative u…4.8
- CVE-2021-39408Cross Site Scripting (XSS) vulnerability exists in Online St…6.1
Are you affected by CVE-2021-39392?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST