CVE-2020-8439
MEDIUMCVSS 6.5/10EPSS 1.59%
Last modified
CVE-2020-8439 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. Monstra CMS through 3.0.4 allows remote authenticated users to take over arbitrary user accounts via a modified login parameter to an edit URI, as demonstrated by login=victim to the users/21/edit URI.. EPSS estimates a 1.59% chance of exploitation in the next 30 days.
Description
Monstra CMS through 3.0.4 allows remote authenticated users to take over arbitrary user accounts via a modified login parameter to an edit URI, as demonstrated by login=victim to the users/21/edit URI.
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Monstra | Monstra | <= 3.0.4 |
References
- http://uploadboy.me/cn40ne6p89t6/POC.mp4.htmlExploit, Third Party Advisory
- https://cert.ikiu.ac.ir/public-files/pages/attachments/11/02630f153869936d555a79f89d717f9c.pdfMitigation, Third Party Advisory
- http://uploadboy.me/cn40ne6p89t6/POC.mp4.htmlExploit, Third Party Advisory
- https://cert.ikiu.ac.ir/public-files/pages/attachments/11/02630f153869936d555a79f89d717f9c.pdfMitigation, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2020-8439?
Monstra CMS through 3.0.4 allows remote authenticated users to take over arbitrary user accounts via a modified login parameter to an edit URI, as demonstrated by login=victim to the users/21/edit URI.
How severe is CVE-2020-8439?
CVE-2020-8439 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 1.59% probability of exploitation in the next 30 days.
How do I fix CVE-2020-8439?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
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.
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Are you affected by CVE-2020-8439?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST