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DownloadApplication · Phoca

CVE-2026-57828

HIGH · 8.8 CVSS v3.1 Published 2026-07-11
Fix available
A fix is available. Upgrade to 6.1.3 or later.
See remediation →
94/100
Remediation priority · Urgent
Remotely reachable Zero-click 6 weeks old

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
Joomla Extension - phoca.cz - Authenticated file upload in RSFiles component < 6.1.3 - The Joomla extension Phoca Downloads is vulnerable to an authenticated arbitrary file upload that allows registered users uploading executable files and leads to full RCE.

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

Authenticated arbitrary file upload vulnerability in the RSFiles component for Joomla allows registered users to upload executable files, achieving full remote code execution.

MitigationUpgrade RSFiles/Phoca Downloads component to version 6.1.3 or later. Until then, restrict or disable file upload permissions for registered users.

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
DownloadApplication
Affected:< 6.1.3

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
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 checks

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

  1. Confirm Joomla installation exists
    Check your web server for a Joomla CMS installation by looking for the /administrator/ directory and the configuration.php file in the web root
    Affected if Joomla CMS is present on the server
  2. Identify Phoca Download component
    Check the /administrator/components/ directory for a com_rsfiles or com_phocadownload folder, or log into the Joomla administrator panel and navigate to Components to confirm RSFiles or Phoca Download is installed
    Affected if The RSFiles or Phoca Download component is installed in Joomla
  3. Determine installed version
    In Joomla admin, go to Components > RSFiles/Phoca Download > and look for the version information in the component's about or control panel page. Alternatively, check the version.php file in /administrator/components/com_rsfiles/ or /administrator/components/com_phocadownload/
    Affected if The installed version is lower than 6.1.3 (e.g., 6.1.2, 6.0.x, etc.)
  4. Verify file upload permissions are enabled
    In Joomla admin, go to Users > Access Levels or the RSFiles/Phoca Download configuration to check if registered users or public users have permission to upload files. Look for upload or create permissions assigned to lower-privileged user groups
    Affected if Registered users or public visitors have file upload permissions enabled in the component settings

Your environment is affected if you have Phoca Download/RSFiles installed with a version below 6.1.3 AND the component allows authenticated users to upload files.

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 6.1.3 or later
Fixed in 6.1.3
Interim mitigation

Upgrade RSFiles/Phoca Downloads component to version 6.1.3 or later. Until then, restrict or disable file upload permissions for registered users.

Recommended fix High confidence

6.1.3

  1. 1. Create a complete backup of the Joomla site including database and files
  2. 2. Download Phoca Downloads version 6.1.3 from the official source (www.phoca.cz)
  3. 3. Log in to the Joomla Administrator backend
  4. 4. Navigate to Extensions > Manage > Install
  5. 5. Upload and install the Phoca Downloads 6.1.3 package
  6. 6. After installation, navigate to Components > Phoca Downloads and verify the installed version shows 6.1.3
  7. 7. Test that file upload functionality works correctly for permitted file types

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

Fix this in Download Scoped from the published advisory
  • Consultation2.0 h
  • Implementation1.0 h
  • Testing2.0 h
  • Review / QA1.0 h
6.0 hours of engineering $1,060
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,696.

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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-2026-57828 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