CVE-2021-33828
HIGHCVSS 8.8/10EPSS 1.16%
Last modified
CVE-2021-33828 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. The files_antivirus component before 1.0.0 for ownCloud mishandles the protection mechanism by which malicious files (that have been uploaded to a public share) are supposed to be deleted upon detection.. EPSS estimates a 1.16% chance of exploitation in the next 30 days.
Description
The files_antivirus component before 1.0.0 for ownCloud mishandles the protection mechanism by which malicious files (that have been uploaded to a public share) are supposed to be deleted upon detection.
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Owncloud | Files Antivirus | < 1.0.0 |
References
- https://doc.owncloud.com/server/admin_manual/release_notes.htmlRelease Notes, Vendor Advisory
- https://owncloud.com/security-advisories/cve-2021-33828/Vendor Advisory
- https://doc.owncloud.com/server/admin_manual/release_notes.htmlRelease Notes, Vendor Advisory
- https://owncloud.com/security-advisories/cve-2021-33828/Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-33828?
The files_antivirus component before 1.0.0 for ownCloud mishandles the protection mechanism by which malicious files (that have been uploaded to a public share) are supposed to be deleted upon detection.
How severe is CVE-2021-33828?
CVE-2021-33828 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 1.16% probability of exploitation in the next 30 days.
How do I fix CVE-2021-33828?
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-2021-33828?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST