---
id: CVE-2011-1950
aliases:
  - GHSA-2qx8-589j-gcpx
  - PYSEC-2011-16
  - PYSEC-2026-2888
title: >-
  Plone and plone.app.users allow remote authenticated users to modify the
  properties of arbitrary accounts
summary: >-
  Plone and plone.app.users allow remote authenticated users to modify the
  properties of arbitrary accounts
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N'
vendor: plone-app-users
product: plone-app-users
ecosystem: pip
affected:
  - 'plone-app-users >= 1.0a1, < 1.0.5'
  - 'plone-app-users >= 1.1b1, < 1.1.1'
  - 'plone >= 4.0.1, < 4.0.6'
  - 'plone >= 4.1.0, < 4.1.1'
patched:
  - plone-app-users 1.0.5
  - plone-app-users 1.1.1
  - plone 4.0.6
  - plone 4.1.1
published: '2018-07-23'
updated: '2026-07-13'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-2qx8-589j-gcpx'
references:
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2011-1950'
  - url: 'https://exchange.xforce.ibmcloud.com/vulnerabilities/67695'
  - url: 'https://github.com/advisories/GHSA-2qx8-589j-gcpx'
  - url: >-
      https://github.com/pypa/advisory-database/tree/main/vulns/plone/PYSEC-2011-16.yaml
  - url: 'http://plone.org/products/plone/security/advisories/CVE-2011-1950'
tags:
  - osv
  - pip
  - in-the-wild
epss: 0.02349
epssPercentile: 0.82777
exploited: true
ingestedAt: '2026-07-13T18:57:51.379Z'
---

## Overview

plone.app.users in Plone 4.0 and 4.1 allows remote authenticated users to modify the properties of arbitrary accounts via unspecified vectors, as exploited in the wild in June 2011.

## Affected packages

- `plone-app-users >= 1.0a1, < 1.0.5`
- `plone-app-users >= 1.1b1, < 1.1.1`
- `plone >= 4.0.1, < 4.0.6`
- `plone >= 4.1.0, < 4.1.1`

## Remediation

Upgrade to a patched release:

- `plone-app-users 1.0.5`
- `plone-app-users 1.1.1`
- `plone 4.0.6`
- `plone 4.1.1`