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Low, CVSS 2.1amended

Tuta Mail has DOM attribute and CSS injection in its Contact Viewer feature

GHSA-24v3-254g-jv85

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (@tutao/tutanota-utils 314.251111.0), 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

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS 4.0
2.1 · CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N · score source
EPSS
No dated EPSS signal available.
Source description

As published by the source; long descriptions are shortened.

Impact Users importing contacts from untrusted sources. Specifically crafted contact data can lead to some of DOM modifications for the link button next to the field e.g. the link address can be overriden. CSS can be manipulated to give the button arbitrary look and change it's size so that any click on the screen would lead to the specified URL. Modifying event listeners does not seem to be possible so no JS can be executed (which would also be prevented by CSP). Technical details The data is included as part of the mithril's hyperscript selector. It is possible to define a value like ][href=https://ddg.gg]style=position:fixed;width:150vw;height:200vh which will be included in the selector passed to Mithril and will be interpreted as part of the code. Patches https://github.com/tutao/tutanota/commit/e28345f5f78f628f9d5c04e785f79543f01dca8b Workarounds Do not open contact viewer on unpatched versions. If the contact was opened, close the app or use keyboard shortcuts to switch to…

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 3 · amended ·

    Amended from ghsa record GHSA-24v3-254g-jv85

  2. Revision 2 · amended ·

    Reviewed OSV alias/range/CVSS4 correction; package source scopes and original publication preserved. No customer finding resolved.

  3. Revision 1 · created ·

    Published from osv record GHSA-24v3-254g-jv85

Agent brief

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# Patch Next advisory brief: GHSA-24v3-254g-jv85

Advisory: Tuta Mail has DOM attribute and CSS injection in its Contact Viewer feature
IDs: GHSA-24v3-254g-jv85
Record: https://patchnext.com/advisories/ghsa-24v3-254g-jv85 (revision 3, source checked 26 Oct 2026, 12:41 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Low (CVSS 2.1)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: @tutao/tutanota-utils 314.251111.0. A vendor fix does not mean a deployment is fixed.

## Affected components
- npm @tutao/tutanota-utils: affected < 314.251111.0; fixed in 314.251111.0

## Suggested inspection (read-only)
- `npm ls @tutao/tutanota-utils --all`: lists every installed copy and version, including transitive ones. Run in the project root after `npm ci`.

## 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 @tutao/tutanota-utils.
- 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://osv.dev/vulnerability/GHSA-24v3-254g-jv85 (OSV record GHSA-24v3-254g-jv85 lists affected ranges: npm @tutao/tutanota-utils >=0 <314.251111.0 (fixed))
- Verified: https://github.com/advisories/GHSA-24v3-254g-jv85 (GitHub-reviewed advisory GHSA-24v3-254g-jv85 lists affected ranges: npm @tutao/tutanota-utils >=0 <314.251111.0)

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