Umbraco.Forms has HTML injection vulnerability in 'Send email' workflow

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS 4.0

2.3 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:H/SA:N/E:U · score source

EPSS

• CVE-2025-47280: 0.30% estimated exploitation activity in the next 30 days; percentile 22.84 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Impact The 'Send email' workflow does not HTML encode the user-provided field values in the sent email message, making any form with this workflow configured vulnerable, as it allows sending the message from a trusted system and address (potentially bypassing spam and email client security systems). Patches This issue affects all (supported) versions Umbraco Forms and is patched in 13.4.2 and 15.1.2. Workarounds Unpatched or unsupported versions can workaround this issue by using the 'Send email with template (Razor)' workflow instead or writing a custom workflow type. To avoid accidentally using the vulnerable workflow again, the SendEmail workflow type can be removed using the following composer (tested on Umbraco 10, 13, 14 and 15):

Published by the source

13 May 2025, 20:17 UTC

Last modified by the source

13 May 2025, 20:17 UTC

Source last checked

26 Oct 2026, 17:03 UTC

1. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-2qrj-g9hq-chph

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# Patch Next advisory brief: CVE-2025-47280

Advisory: Umbraco.Forms has HTML injection vulnerability in 'Send email' workflow
IDs: CVE-2025-47280, GHSA-2qrj-g9hq-chph
Record: https://patchnext.com/advisories/cve-2025-47280 (revision 1, source checked 26 Oct 2026, 17:03 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Low (CVSS 2.3)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Partial vendor fix; fixed versions by package: umbraco.forms 15.1.2, 13.4.2. A vendor fix does not mean a deployment is fixed.

## Affected components
- NuGet umbraco.forms: affected >= 7.0.0, < 13.4.2; >= 14.0.0, < 15.1.2; fixed in 13.4.2, 15.1.2
- NuGet umbracoforms: affected >= 7.0.0, <= 8.13.16

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

## Supported action
No complete vendor fix is recorded. Follow the primary source's mitigation guidance and check this record again before closing anything.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on umbraco.forms, umbracoforms.
- 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-2qrj-g9hq-chph (GitHub-reviewed advisory GHSA-2qrj-g9hq-chph lists affected ranges: NuGet umbraco.forms >=7.0.0 =14.0.0 =7.0.0 <=8.13.16)

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