CVE-2019-20453
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 · uneditedA problem was found in Pydio Core before 8.2.4 and Pydio Enterprise before 8.2.4. A PHP object injection is present in the page plugins/uploader.http/HttpDownload.php. An authenticated user with basic privileges can inject objects and achieve 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 confidenceA PHP object injection vulnerability exists in Pydio Core and Enterprise versions before 8.2.4 within the plugins/uploader.http/HttpDownload.php file. The vulnerability allows an authenticated user with basic privileges to inject PHP objects through insecure deserialization, potentially achieving remote code execution.
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< 8.2.4CVSS 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
- Network
- Complexity
- Low
- Privileges
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/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 checksWork through these to decide whether this CVE applies to you.
-
Identify Pydio installationLocate the Pydio installation directory and check for core files like 'index.php' or 'boot.conf.php' in the web root. Common paths include /var/www/html/pydio or similar.Affected if Pydio software is installed on the system
-
Determine installed Pydio versionCheck the version file or admin panel. Look for a version.php file in the core directory, or access the admin dashboard and navigate to About/Server Info to view the installed version number.Affected if The installed version is less than 8.2.4
-
Verify vulnerable file existsCheck if the file plugins/uploader.http/HttpDownload.php exists in the Pydio installation directory. Use file system inspection or a web path probe.Affected if The file plugins/uploader.http/HttpDownload.php exists in the installation
-
Confirm user authentication is enabledCheck if basic authentication and user accounts are enabled in Pydio. Inspect the authentication configuration in the admin panel or conf/bootstrap_conf.php for auth plugins.Affected if Basic user authentication is enabled allowing user logins
-
Check uploader.http plugin statusInspect the plugin configuration in admin panel under Plugin Manager or check the plugins/uploader.http/plugin_info.xml file to verify if the HTTP uploader plugin is active.Affected if The uploader.http plugin is enabled
A system is affected if it runs Pydio Core or Enterprise version below 8.2.4 with the uploader.http plugin enabled and user authentication active, as this provides the conditions required for the PHP object injection attack vector.
Generated from the published advisory. Verify against your own configuration.
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.
From vendor data8.2.4
Upgrade to Pydio Core 8.2.4 or Pydio Enterprise 8.2.4 or later to obtain the patch for this vulnerability. If immediate upgrading is not possible, restrict access to the affected component and monitor for exploitation attempts.
- Consultation2.0 h
- Implementation2.0 h
- Testing3.0 h
- Review / QA1.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $2,224.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2019-20453 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2019-20453 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.
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.
- 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