CVE-2021-40940
CRITICALCVSS 9.8/10EPSS 1.58%
Last modified
CVE-2021-40940 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Monstra 3.0.4 does not filter the case of php, which leads to an unrestricted file upload vulnerability.. EPSS estimates a 1.58% chance of exploitation in the next 30 days.
Description
Monstra 3.0.4 does not filter the case of php, which leads to an unrestricted file upload vulnerability.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Monstra | Monstra | <= 3.0.4 |
References
- https://github.com/monstra-cms/monstra/issues/471Exploit, Issue Tracking, Patch, Third Party Advisory
- https://github.com/monstra-cms/monstra/issues/471Exploit, Issue Tracking, Patch, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-40940?
Monstra 3.0.4 does not filter the case of php, which leads to an unrestricted file upload vulnerability.
How severe is CVE-2021-40940?
CVE-2021-40940 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.58% probability of exploitation in the next 30 days.
How do I fix CVE-2021-40940?
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.
Related CVEs from 2021
- CVE-2021-40924Cross-site scripting (XSS) vulnerability in install/index.ph…6.1
- CVE-2021-40925Cross-site scripting (XSS) vulnerability in dompdf/dompdf/ww…6.1
- CVE-2021-40926Cross-site scripting (XSS) vulnerability in demos/demo.mysql…6.1
- CVE-2021-40927Cross-site scripting (XSS) vulnerability in callback.php in …6.1
- CVE-2021-40928Cross-site scripting (XSS) vulnerability in index.php in Fle…6.1
- CVE-2021-4093A flaw was found in the KVM's AMD code for supporting the Se…8.8
- CVE-2021-40941In Bento4 1.6.0-638, there is an allocator is out of memory …7.5
- CVE-2021-40942In GPAC MP4Box v1.1.0, there is a heap-buffer-overflow in th…5.5
- CVE-2021-40943In Bento4 1.6.0-638, there is a null pointer reference in th…5.5
- CVE-2021-40944In GPAC MP4Box 1.1.0, there is a Null pointer reference in t…5.5
- CVE-2021-4095A NULL pointer dereference was found in the Linux kernel's K…5.5
- CVE-2021-40954Laiketui 3.5.0 is affected by an arbitrary file upload vulne…9.8
Are you affected by CVE-2021-40940?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST