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Owncloud Desktop ClientApplication · Owncloud

CVE-2021-44537

HIGH · 7.8 CVSS v3.1 Published 2022-01-15
Fix available
A fix is available. Upgrade to 2.9.2 or later.
See remediation →
81/100
Remediation priority · High
No privileges

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
ownCloud owncloud/client before 2.9.2 allows Resource Injection by a server into the desktop client via a URL, leading to remote code execution.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

The ownCloud desktop client before version 2.9.2 is vulnerable to resource injection where a malicious or compromised ownCloud server can send specially crafted URLs to the client, allowing remote code execution on the affected system.

MitigationUpgrade the ownCloud desktop client to version 2.9.2 or later to remediate this vulnerability.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Owncloud Desktop ClientApplication
Affected:< 2.9.2
FedoraOperating system
Affected:= 35= 36

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify ownCloud desktop client version
    Open the ownCloud desktop client application and navigate to Help > About, or check the installed package version using your system's package manager (e.g., rpm -qa | grep owncloud, dpkg -l | grep owncloud, or the Add/Remove Programs section in Windows Settings)
    Affected if The displayed version number is less than 2.9.2 (for example, 2.9.1, 2.9.0, 2.8.x, or earlier)
  2. Confirm operating system is Fedora 35 or 36
    Run 'cat /etc/fedora-release' or 'rpm -q fedora-release' in a terminal to check the OS version
    Affected if The system is running Fedora 35 or Fedora 36 and has an ownCloud desktop client installed with version below 2.9.2
  3. Check if ownCloud client is actively used
    Verify whether the ownCloud desktop client application is installed and has an active account configuration connecting to any ownCloud server
    Affected if The client is installed and configured to connect to an ownCloud server, as the vulnerability is triggered when a malicious server sends crafted URLs to the client
  4. Determine if client can receive remote URLs
    This is inherent to the ownCloud desktop client's design - it receives and processes URLs from the ownCloud server it connects to. No specific configuration check needed beyond verifying the client is in use
    Affected if The client is actively processing or has recently processed URLs from a connected ownCloud server, which is standard operation for this application

Your environment is affected if the ownCloud desktop client version is below 2.9.2, particularly on Fedora 35 or 36 systems, regardless of which ownCloud server the client connects to.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 2.9.2 or later
Fixed in 2.9.2
Interim mitigation

Upgrade the ownCloud desktop client to version 2.9.2 or later to remediate this vulnerability.

Recommended fix High confidence

ownCloud Desktop Client 2.9.2 or later

  1. 1. Check current ownCloud Desktop Client version by opening the client and navigating to Help > About, or by running: owncloud --version
  2. 2. Download ownCloud Desktop Client version 2.9.2 or later from the official ownCloud website at https://owncloud.com/desktop-client/ or your distribution's package manager
  3. 3. For Linux/Fedora systems, update via dnf: sudo dnf update owncloud-client
  4. 4. For Windows/macOS, run the installer and follow the prompts to upgrade
  5. 5. After upgrade, restart the client and verify the version is 2.9.2 or higher under Help > About
  6. 6. Re-connect to your ownCloud server to ensure normal operation

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Owncloud Desktop Client Scoped from the published advisory
  • Consultation2.0 h
  • Implementation4.0 h
  • Testing2.0 h
  • Review / QA1.0 h
9.0 hours of engineering $1,600
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $2,560.

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2021-44537 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data