dbcve.org
Missing AuthorizationWeakness · CWE-862

CVE-2026-54004

MEDIUM · 6.3 CVSS v4.0 Published 2026-07-09
Patch available
A vendor patch is available. No clean upgrade release — apply the published patch.
See remediation →
72/100
Remediation priority · Elevated
Remotely reachable No privileges Zero-click Patch available 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
Kirby is an open-source content management system. Prior to 4.9.4 and 5.4.4, Kirby sites with content.fileRedirects enabled could redirect unauthenticated clean file URL requests for files stored in top-level draft pages to physical media URLs without checking page access permissions or preview tokens, leading to disclosure of draft file contents. This issue is fixed in versions 4.9.4 and 5.4.4.

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
How this class of weakness works · CWE-862

The application checks who you are but not whether you're allowed to perform a given action, so any authenticated user can reach things meant for others. This is the classic “change the ID in the URL” bug. The fix is an authorization check on every request, evaluated against the acting user's permissions.

General guidance for the missing authorization class — the official description and references above are authoritative for this specific CVE. Want a bespoke review and a reviewed fix? Ask our team →

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
None
Authentication
X
User interaction
None
Scope
X

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

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
Patch available Apply the vendor patch
Vendor patch github.com →
Recommended fix High confidence

Kirby 4.9.4 or 5.4.4 (depending on your major version line)

  1. Identify current Kirby version by checking composer.json or by running bin/kirby version
  2. If running Kirby 4.x (versions < 4.9.4), upgrade to 4.9.4: run 'composer update getkirby/kirby:^4.9.4' or update the version constraint in composer.json
  3. If running Kirby 5.x (versions < 5.4.4), upgrade to 5.4.4: run 'composer update getkirby/kirby:^5.4.4' or update the version constraint in composer.json
  4. Run 'composer install' or 'composer update' to install the new version
  5. Clear any cached data (e.g., rm -rf site/cache/*)
  6. Verify the site functions correctly after the upgrade
Caveat Minor/patch releases typically have minimal breaking changes; review the Kirby changelog for any deprecation notes between your current version and the target version

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

We can apply and verify the patch for your build — typical engagement from $1,600. Get the patch applied

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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-2026-54004 in production — separate from our analysis above.

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