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Medium, CVSS 4.6

Umbraco has a Potential Code Execution Risk When Viewing SVG Files in Full Screen in Backoffice

CVE-2024-48927GHSA-5955-cwv4-h7qh

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (umbraco.cms 13.5.2, 10.8.7; umbracocms 8.18.15), redeploy, then verify what is actually installed.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

  • NuGet umbraco.cms

    Affected
    >= 10.0.0, < 10.8.7>= 13.0.0, < 13.5.2
    Fixed in
    10.8.7, 13.5.2

  • NuGet umbracocms

    Affected
    >= 8.0.0, < 8.18.15
    Fixed in
    8.18.15

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS
4.6 · CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
EPSS
  • CVE-2024-48927: 0.47% estimated exploitation activity in the next 30 days; percentile 40.45 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.
Source description

As published by the source; long descriptions are shortened.

Impact There is a potential risk of code execution for Backoffice users when they “preview” SVG files in full screen mode. Workarounds Server-side file validation is available to strip script tags from file's content during the file upload process.

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 1 · created ·

    Published from ghsa record GHSA-5955-cwv4-h7qh

Agent brief

Preview the exact text before you copy it. Commands are read-only suggestions; review them before running anything.

# Patch Next advisory brief: CVE-2024-48927

Advisory: Umbraco has a Potential Code Execution Risk When Viewing SVG Files in Full Screen in Backoffice
IDs: CVE-2024-48927, GHSA-5955-cwv4-h7qh
Record: https://patchnext.com/advisories/cve-2024-48927 (revision 1, source checked 26 Oct 2026, 17:00 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 4.6)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: umbraco.cms 13.5.2, 10.8.7; umbracocms 8.18.15. A vendor fix does not mean a deployment is fixed.

## Affected components
- NuGet umbraco.cms: affected >= 10.0.0, < 10.8.7; >= 13.0.0, < 13.5.2; fixed in 10.8.7, 13.5.2
- NuGet umbracocms: affected >= 8.0.0, < 8.18.15; fixed in 8.18.15

## Suggested inspection (read-only)
- NuGet umbraco.cms: check the installed version with your package manager.
- NuGet umbracocms: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on umbraco.cms, umbracocms.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-5955-cwv4-h7qh (GitHub-reviewed advisory GHSA-5955-cwv4-h7qh lists affected ranges: NuGet umbracocms >=8.0.0 =10.0.0 =13.0.0 <13.5.2)

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