---
id: CVE-2026-54503
title: >-
  plone.app.textfield provides a zope.schema-style field type called RichText
  for storing a value with a related MIME type
summary: >-
  plone.app.textfield provides a zope.schema-style field type called RichText
  for storing a value with a related MIME type. Prior to 2.0.2, 3.0.2, and
  4.0.1, depending on the release line, RichTextValue.output returns an
  unsanitized stored…
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N'
cwe:
  - CWE-80
vendor: plone
product: plone.app.textfield
affected:
  - plone.app.textfield < 2.0.2
  - 'plone.app.textfield >= 3.0.0, < 3.0.2'
  - 'plone.app.textfield >= 4.0.0, < 4.0.1'
patched:
  - plone-app-textfield 2.0.2
  - plone-app-textfield 3.0.2
  - plone-app-textfield 4.0.1
published: '2026-09-15'
updated: '2026-09-15'
sourceUpdated: '2026-09-15T19:17:20.483'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-54503'
references:
  - url: >-
      https://github.com/plone/plone.app.textfield/commit/0da1aeec2406cf640977eb857a03e792d2c7cac2
    label: security-advisories@github.com
  - url: >-
      https://github.com/plone/plone.app.textfield/commit/467638e500d804c637031387a227a2b02d12a86f
    label: security-advisories@github.com
  - url: >-
      https://github.com/plone/plone.app.textfield/commit/781d517a38524087fe57525a94806684908f852f
    label: security-advisories@github.com
  - url: >-
      https://github.com/plone/plone.app.textfield/security/advisories/GHSA-4r4f-gg25-rmg5
    label: security-advisories@github.com
  - url: 'https://github.com/plone/plone.app.textfield'
tags:
  - nvd
  - cve.org
  - osv
  - pip
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-15T19:02:07.172464Z'
aliases:
  - GHSA-4r4f-gg25-rmg5
ecosystem: pip
ingestedAt: '2026-07-17T19:00:50.622Z'
epss: 0.004
epssPercentile: 0.31474
---

## Overview

plone.app.textfield provides a zope.schema-style field type called RichText for storing a value with a related MIME type. Prior to 2.0.2, 3.0.2, and 4.0.1, depending on the release line, RichTextValue.output returns an unsanitized stored RichText value when mimeType equals outputMimeType, including values that claim the text/x-html-safe output type. This equality shortcut bypasses the safe_html transform even though the transform itself correctly removes event-handler attributes and unsafe URI schemes. Equal types can result from a RichText field configured with the same mimeType and outputMimeType or from REST API input that supplies text/x-html-safe as its content type. The raw stored value is then emitted through tal:content=structure without escaping, allowing a user who can set a RichText field to store JavaScript that executes in a viewer's browser. This issue is fixed in versions 2.0.2, 3.0.2, and 4.0.1.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-54503)

Affected packages:

- `plone-app-textfield < 2.0.2`
- `plone-app-textfield >= 3.0.0, < 3.0.2`
- `plone-app-textfield >= 4.0.0, < 4.0.1`

Patched in:

- `plone-app-textfield 2.0.2`
- `plone-app-textfield 3.0.2`
- `plone-app-textfield 4.0.1`

Source: https://osv.dev/vulnerability/GHSA-4r4f-gg25-rmg5