CVE-2011-2528: Plone High Severity Vulnerability That Affects Vulnerability

HIGH
Advisory Identifier: GHSA-p6h9-hpcg-c6gm
Share
Published
Advisory Summary

CVE-2011-2528 is a HIGH high severity vulnerability that affects vulnerability (General Security Weakness) affecting Plone libraries in the PyPI ecosystem. The issue involves high severity vulnerability that affects plone and zope2. Remediation is available by upgrading affected packages to version 3.3.6, 2.12.19, 2.13.8.

CVE-2011-2528 at a Glance

CVE Identifier CVE-2011-2528
GHSA Identifier GHSA-p6h9-hpcg-c6gm
Severity HIGH
CVSS v3.1 Base Score N/A
CWE Classification General Security Weakness
Affected Product Plone
Package Ecosystem PyPI
Published Date
Last Updated

How to Fix CVE-2011-2528

To remediate this vulnerability, upgrade all affected Plone dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

Plone fixed: 3.3.6 
pip install Plone>=3.3.6
Zope2 fixed: 2.12.19 
pip install Zope2>=2.12.19
Zope2 fixed: 2.13.8 
pip install Zope2>=2.13.8
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

pip show Plone

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2011-2528, inspect your installed packages using pip:

pip show Plone

Analyze the terminal output to locate any version of Plone in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 3.3.6), your application is affected.

Note: The pip show Plone command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under General Security Weakness. In Plone, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

Unspecified vulnerability in (1) Zope 2.12.x before 2.12.19 and 2.13.x before 2.13.8, as used in Plone 4.x and other products, and (2) PloneHotfix20110720 for Plone 3.x allows attackers to gain privileges via unspecified vectors, related to a "highly serious vulnerability." NOTE: this vulnerability exists because of an incorrect fix for CVE-2011-0720.

CVE-2011-2528 Affected Plone Versions

3 component(s)
Fixed Versions:
3.3.62.12.192.13.8
Product / Package Ecosystem Affected Versions Fixed Version
Plone
pypi/Plone
PyPI
≥ 3.3.2
< 3.3.6
3.3.6
Zope2
pypi/Zope2
PyPI
≥ 2.12.0
< 2.12.19
2.12.19
Zope2
pypi/Zope2
PyPI
≥ 2.13.0
< 2.13.8
2.13.8

References

NVD — CVE-2011-2528 NVD
https://nvd.nist.gov/vuln/detail/CVE-2011-2528
bugzilla.redhat.com/show_bug.cgi WEB
https://bugzilla.redhat.com/show_bug.cgi?id=718824
Plone Source Repository REPOSITORY
https://github.com/pypa/advisory-database/tree/main/vulns/plone/PYSEC-2011-25.yaml
Plone Source Repository REPOSITORY
https://github.com/pypa/advisory-database/tree/main/vulns/plone/PYSEC-2011-32.yaml
mail.zope.org/pipermail/zope-anno... WEB
https://mail.zope.org/pipermail/zope-announce/2011-June/002260.html
Plone Release RELEASE
https://plone.org/products/plone-hotfix/releases/20110622
Plone Security Information SECURITY
https://plone.org/products/plone/security/advisories/20110622
Plone Security Information SECURITY
https://www.openwall.com/lists/oss-security/2011/07/04/6
Plone Security Information SECURITY
https://www.openwall.com/lists/oss-security/2011/07/12/9
Plone Release RELEASE
http://plone.org/products/plone-hotfix/releases/20110622
Plone Security Information SECURITY
http://plone.org/products/plone/security/advisories/20110622
secunia.com/advisories/45056 WEB
http://secunia.com/advisories/45056
secunia.com/advisories/45111 WEB
http://secunia.com/advisories/45111
Plone Security Information SECURITY
http://www.openwall.com/lists/oss-security/2011/07/04/6
Plone Security Information SECURITY
http://www.openwall.com/lists/oss-security/2011/07/12/9

Frequently Asked Questions

What is CVE-2011-2528?
CVE-2011-2528 is a security vulnerability in Plone involving High severity vulnerability that affects Plone and Zope2 under General Security Weakness.
Which Plone versions are affected?
Affected versions include releases prior to 3.3.6, 2.12.19, 2.13.8 across affected packages: Plone, Zope2.
What version fixes CVE-2011-2528?
Upgrading to 3.3.6, 2.12.19, 2.13.8 (or the latest patched release for your respective branch) resolves the vulnerability.
Is Plone affected?
Yes, Plone is affected in releases prior to 3.3.6. Upgrade your dependency to 3.3.6 or later.
Is Zope2 affected?
Yes, Zope2 is affected in releases prior to 2.12.19, 2.13.8. Upgrade your dependency to 2.12.19, 2.13.8 or later.
What CWE is associated with CVE-2011-2528?
CVE-2011-2528 is classified under General Security Weakness.
How can I check PyPI dependencies for CVE-2011-2528?
Run the dependency tree command: 'pip show Plone'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-p6h9-hpcg-c6gm",
  "modified" : "2026-06-08T19:03:38Z",
  "published" : "2018-07-23T19:52:02Z",
  "aliases" : [ "CVE-2011-2528" ],
  "summary" : "High severity vulnerability that affects Plone and Zope2",
  "details" : "Unspecified vulnerability in (1) Zope 2.12.x before 2.12.19 and 2.13.x before 2.13.8, as used in Plone 4.x and other products, and (2) PloneHotfix20110720 for Plone 3.x allows attackers to gain privileges via unspecified vectors, related to a \"highly serious vulnerability.\" NOTE: this vulnerability exists because of an incorrect fix for CVE-2011-0720.",
  "severity" : [ ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "Plone"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "3.3.2"
      }, {
        "fixed" : "3.3.6"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "Zope2"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.12.0"
      }, {
        "fixed" : "2.12.19"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "Zope2"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.13.0"
      }, {
        "fixed" : "2.13.8"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2011-2528"
  }, {
    "type" : "WEB",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=718824"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pypa/advisory-database/tree/main/vulns/plone/PYSEC-2011-25.yaml"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pypa/advisory-database/tree/main/vulns/plone/PYSEC-2011-32.yaml"
  }, {
    "type" : "WEB",
    "url" : "https://mail.zope.org/pipermail/zope-announce/2011-June/002260.html"
  }, {
    "type" : "WEB",
    "url" : "https://plone.org/products/plone-hotfix/releases/20110622"
  }, {
    "type" : "WEB",
    "url" : "https://plone.org/products/plone/security/advisories/20110622"
  }, {
    "type" : "WEB",
    "url" : "https://www.openwall.com/lists/oss-security/2011/07/04/6"
  }, {
    "type" : "WEB",
    "url" : "https://www.openwall.com/lists/oss-security/2011/07/12/9"
  }, {
    "type" : "WEB",
    "url" : "http://plone.org/products/plone-hotfix/releases/20110622"
  }, {
    "type" : "WEB",
    "url" : "http://plone.org/products/plone/security/advisories/20110622"
  }, {
    "type" : "WEB",
    "url" : "http://secunia.com/advisories/45056"
  }, {
    "type" : "WEB",
    "url" : "http://secunia.com/advisories/45111"
  }, {
    "type" : "WEB",
    "url" : "http://www.openwall.com/lists/oss-security/2011/07/04/6"
  }, {
    "type" : "WEB",
    "url" : "http://www.openwall.com/lists/oss-security/2011/07/12/9"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2020-06-16T21:48:24Z",
    "nvd_published_at" : "2011-07-19T20:55:01Z"
  }
}