What’s Vulnerable › Vulnerabilities

CVE-2021-33828

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-01-15 · updated 2026-06-17
• Weakness: CWE-434

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.

Affected products

• owncloud Files Antivirus: before 1.0.0 — fixed in 1.0.0

How to fix

Upgrade to a fixed version: owncloud Files Antivirus 1.0.0. Check the vendor advisory for mitigations.

References

• https://doc.owncloud.com/server/admin_manual/release_notes.html
• https://owncloud.com/security-advisories/cve-2021-33828/
• https://doc.owncloud.com/server/admin_manual/release_notes.html
• https://owncloud.com/security-advisories/cve-2021-33828/

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