CVE-2021-43421
CRITICALCVSS 9.8/10EPSS 42.78%
Last modified
CVE-2021-43421 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. A File Upload vulnerability exists in Studio-42 elFinder 2.0.4 to 2.1.59 via connector.minimal.php, which allows a remote malicious user to upload arbitrary files and execute PHP code.. EPSS estimates a 42.78% chance of exploitation in the next 30 days.
Description
A File Upload vulnerability exists in Studio-42 elFinder 2.0.4 to 2.1.59 via connector.minimal.php, which allows a remote malicious user to upload arbitrary files and execute PHP 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 |
|---|---|---|
| Std42 | Elfinder | >= 2.0.4, <= 2.1.59 |
References
- https://github.com/Studio-42/elFinder/issues/3429Exploit, Issue Tracking, Third Party Advisory
- https://twitter.com/infosec_90/status/1455180286354919425Third Party Advisory
- https://github.com/Studio-42/elFinder/issues/3429Exploit, Issue Tracking, Third Party Advisory
- https://twitter.com/infosec_90/status/1455180286354919425Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-43421?
A File Upload vulnerability exists in Studio-42 elFinder 2.0.4 to 2.1.59 via connector.minimal.php, which allows a remote malicious user to upload arbitrary files and execute PHP code.
How severe is CVE-2021-43421?
CVE-2021-43421 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 42.78% probability of exploitation in the next 30 days.
How do I fix CVE-2021-43421?
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-2021-43421?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST