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GrocyApplication · Grocy Project

CVE-2024-8370

MEDIUM · 5.4 CVSS v3.1 Published 2024-09-01
Fix available
A fix is available. Upgrade to after 4.2.0 or later.
See remediation →
58/100
Remediation priority · Elevated
Public exploit Remotely reachable

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
A vulnerability classified as problematic was found in Grocy up to 4.2.0. This vulnerability affects unknown code of the file /api/files/recipepictures/ of the component SVG File Upload Handler. The manipulation of the argument force_serve_as with the input picture' leads to cross site scripting. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used. The real existence of this vulnerability is still doubted at the moment. Unfortunately, the project maintainer does not want to be quoted in any way regarding the dispute rationale. The security policy of the project implies that this finding is "practically irrelevant" due to authentication requirements.

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-79

Untrusted input is placed into a web page without being neutralised, so an attacker's markup or script executes in another user's browser. That can hijack sessions, capture keystrokes, or silently perform actions as the victim. Fixing it properly means context-aware output encoding everywhere data meets HTML, backed by a content-security policy as a second line of defence.

General guidance for the cross-site scripting (xss) class — the official description and references above are authoritative for this specific CVE. Want a bespoke review and a reviewed fix? Ask our team →

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
GrocyApplication
Affected:<= 4.2.0

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
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

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

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 a release after 4.2.0
Recommended fix Moderate confidence

Grocy 4.3.0 or later (latest stable release)

  1. 1. Check the current Grocy version by navigating to the web interface (usually displayed in the footer) or checking via API
  2. 2. Identify the latest stable Grocy release from the official GitHub repository (grocy/grocy)
  3. 3. Backup the current Grocy installation, including the database and configuration files
  4. 4. Download the latest stable release from https://github.com/grocy/grocy/releases
  5. 5. Extract the new release files, replacing the existing installation
  6. 6. Ensure the /api/files/recipepictures/ endpoint now properly sanitizes the force_serve_as parameter
  7. 7. Verify the fix by testing SVG file upload with XSS payloads in the force_serve_as parameter
  8. 8. Confirm authentication is still required for the endpoint
Caveat Minor version upgrades in Grocy typically do not include breaking changes, but review release notes for any database migrations or configuration changes

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

We can identify the exact fixed release, upgrade, and verify it in staging — typical engagement from $900. Get the upgrade done

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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-2024-8370 in production — separate from our analysis above.

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What this is

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