---
id: CVE-2015-7315
aliases:
  - GHSA-984m-rj28-8c6x
  - PYSEC-2017-52
  - PYSEC-2026-2964
title: Plone unauthorized member addition vulnerability
summary: Plone unauthorized member addition vulnerability
severity: medium
cvss: 5.9
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N'
vendor: products-cmfplone
product: products-cmfplone
ecosystem: pip
affected:
  - 'products-cmfplone >= 3.3.0, < 4.3.7'
  - 'products-cmfplone >= 5.0a1, < 5.0rc2'
  - 'plone >= 3.3, <= 3.3.6'
  - 'plone >= 4.0a1, <= 4.0.10'
  - 'plone >= 4.1a1, <= 4.1.6'
  - 'plone >= 4.2a1, <= 4.2.7'
  - 'plone >= 4.3a1, <= 4.3.6'
  - plone
patched:
  - products-cmfplone 4.3.7
  - products-cmfplone 5.0rc2
published: '2022-05-17'
updated: '2026-07-13'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-984m-rj28-8c6x'
references:
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2015-7315'
  - url: >-
      https://github.com/plone/Products.CMFPlone/commit/1845b0a92312291811b68907bf2aa0fb448c4016
  - url: >-
      https://github.com/plone/Products.CMFPlone/commit/9f0111f85cd14f3f067044b59b93e2856c99d542
  - url: >-
      https://github.com/zopefoundation/Products.CMFCore/commit/e1d981bfa14b664317285f0f36498f4be4a23406
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=1264791'
  - url: 'https://github.com/plone/Products.CMFPlone'
  - url: >-
      https://github.com/pypa/advisory-database/tree/main/vulns/plone/PYSEC-2017-52.yaml
  - url: >-
      https://plone.org/security/hotfix/20150910/anonymous-is-able-to-create-plone-members
  - url: 'https://pypi.org/project/Products.PloneHotfix20150910'
  - url: 'http://www.openwall.com/lists/oss-security/2015/09/22/13'
tags:
  - osv
  - pip
epss: 0.02111
epssPercentile: 0.80722
ingestedAt: '2026-07-13T18:57:55.761Z'
---

## Overview

Plone 3.3.0 through 3.3.6, 4.0.0 through 4.0.10, 4.1.0 through 4.1.6, 4.2.0 through 4.2.7, 4.3.0 through 4.3.6, and 5.0rc1 allows remote attackers to add a new member to a Plone site with registration enabled, without acknowledgment of site administrator.

## Affected packages

- `products-cmfplone >= 3.3.0, < 4.3.7`
- `products-cmfplone >= 5.0a1, < 5.0rc2`
- `plone >= 3.3, <= 3.3.6`
- `plone >= 4.0a1, <= 4.0.10`
- `plone >= 4.1a1, <= 4.1.6`
- `plone >= 4.2a1, <= 4.2.7`
- `plone >= 4.3a1, <= 4.3.6`
- `plone`

## Remediation

Upgrade to a patched release:

- `products-cmfplone 4.3.7`
- `products-cmfplone 5.0rc2`