{"api_version":"1","generated_at":"2026-04-23T02:58:43+00:00","cve":"CVE-2021-32811","urls":{"html":"https://cve.report/CVE-2021-32811","api":"https://cve.report/api/cve/CVE-2021-32811.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2021-32811","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-32811"},"summary":{"title":"CVE-2021-32811","description":"Zope is an open-source web application server. Zope versions prior to versions 4.6.3 and 5.3 have a remote code execution security issue. In order to be affected, one must use Python 3 for one's Zope deployment, run Zope 4 below version 4.6.3 or Zope 5 below version 5.3, and have the optional `Products.PythonScripts` add-on package installed. By default, one must have the admin-level Zope \"Manager\" role to add or edit Script (Python) objects through the web. Only sites that allow untrusted users to add/edit these scripts through the web are at risk. Zope releases 4.6.3 and 5.3 are not vulnerable. As a workaround, a site administrator can restrict adding/editing Script (Python) objects through the web using the standard Zope user/role permission mechanisms. Untrusted users should not be assigned the Zope Manager role and adding/editing these scripts through the web should be restricted to trusted users only. This is the default configuration in Zope.","state":"PUBLIC","assigner":"security-advisories@github.com","published_at":"2021-08-02 22:15:00","updated_at":"2022-12-02 19:35:00"},"problem_types":["CWE-1321"],"metrics":[],"references":[{"url":"https://github.com/zopefoundation/Zope/commit/f72a18dda8e9bf2aedb46168761668464a4be988","name":"https://github.com/zopefoundation/Zope/commit/f72a18dda8e9bf2aedb46168761668464a4be988","refsource":"MISC","tags":[],"title":"Merge pull request from GHSA-g4gq-j4p2-j8fr · zopefoundation/Zope@f72a18d · GitHub","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://github.com/zopefoundation/Zope/security/advisories/GHSA-g4gq-j4p2-j8fr","name":"https://github.com/zopefoundation/Zope/security/advisories/GHSA-g4gq-j4p2-j8fr","refsource":"CONFIRM","tags":[],"title":"Remote Code Execution via Script (Python) objects under Python 3 · Advisory · zopefoundation/Zope · GitHub","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://github.com/zopefoundation/AccessControl/security/advisories/GHSA-qcx9-j53g-ccgf","name":"https://github.com/zopefoundation/AccessControl/security/advisories/GHSA-qcx9-j53g-ccgf","refsource":"MISC","tags":[],"title":"Remote Code Execution via unsafe classes in otherwise permitted modules · Advisory · zopefoundation/AccessControl · GitHub","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-32811","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-32811","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2021","cve_id":"32811","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"zope","cpe5":"accesscontrol","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2021","cve_id":"32811","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"zope","cpe5":"zope","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[{"cve":"CVE-2021-32811","qid":"981410","title":"Python (pip) Security Update for Zope (GHSA-g4gq-j4p2-j8fr)"}]},"source_records":{"cve_program":{"CVE_data_meta":{"ASSIGNER":"security-advisories@github.com","ID":"CVE-2021-32811","STATE":"PUBLIC","TITLE":"Remote Code Execution via Script (Python) objects under Python 3"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"Zope","version":{"version_data":[{"version_value":">= 4.0, < 4.6.3"},{"version_value":">= 5.0, < 5.3"}]}}]},"vendor_name":"zopefoundation"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"Zope is an open-source web application server. Zope versions prior to versions 4.6.3 and 5.3 have a remote code execution security issue. In order to be affected, one must use Python 3 for one's Zope deployment, run Zope 4 below version 4.6.3 or Zope 5 below version 5.3, and have the optional `Products.PythonScripts` add-on package installed. By default, one must have the admin-level Zope \"Manager\" role to add or edit Script (Python) objects through the web. Only sites that allow untrusted users to add/edit these scripts through the web are at risk. Zope releases 4.6.3 and 5.3 are not vulnerable. As a workaround, a site administrator can restrict adding/editing Script (Python) objects through the web using the standard Zope user/role permission mechanisms. Untrusted users should not be assigned the Zope Manager role and adding/editing these scripts through the web should be restricted to trusted users only. This is the default configuration in Zope."}]},"impact":{"cvss":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"CWE-915: Improperly Controlled Modification of Dynamically-Determined Object Attributes"}]}]},"references":{"reference_data":[{"name":"https://github.com/zopefoundation/Zope/security/advisories/GHSA-g4gq-j4p2-j8fr","refsource":"CONFIRM","url":"https://github.com/zopefoundation/Zope/security/advisories/GHSA-g4gq-j4p2-j8fr"},{"name":"https://github.com/zopefoundation/AccessControl/security/advisories/GHSA-qcx9-j53g-ccgf","refsource":"MISC","url":"https://github.com/zopefoundation/AccessControl/security/advisories/GHSA-qcx9-j53g-ccgf"},{"name":"https://github.com/zopefoundation/Zope/commit/f72a18dda8e9bf2aedb46168761668464a4be988","refsource":"MISC","url":"https://github.com/zopefoundation/Zope/commit/f72a18dda8e9bf2aedb46168761668464a4be988"}]},"source":{"advisory":"GHSA-g4gq-j4p2-j8fr","discovery":"UNKNOWN"}},"nvd":{"publishedDate":"2021-08-02 22:15:00","lastModifiedDate":"2022-12-02 19:35:00","problem_types":["CWE-1321"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"HIGH","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH","baseScore":7.2,"baseSeverity":"HIGH"},"exploitabilityScore":1.2,"impactScore":5.9},"baseMetricV2":{"cvssV2":{"version":"2.0","vectorString":"AV:N/AC:L/Au:S/C:P/I:P/A:P","accessVector":"NETWORK","accessComplexity":"LOW","authentication":"SINGLE","confidentialityImpact":"PARTIAL","integrityImpact":"PARTIAL","availabilityImpact":"PARTIAL","baseScore":6.5},"severity":"MEDIUM","exploitabilityScore":8,"impactScore":6.4,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}},"configurations":{"CVE_data_version":"4.0","nodes":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:zope:accesscontrol:*:*:*:*:*:*:*:*","versionStartIncluding":"5.0","versionEndExcluding":"5.2","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:zope:accesscontrol:*:*:*:*:*:*:*:*","versionStartIncluding":"4.0","versionEndExcluding":"4.3","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:zope:zope:*:*:*:*:*:*:*:*","versionStartIncluding":"5.0","versionEndExcluding":"5.3","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:zope:zope:*:*:*:*:*:*:*:*","versionStartIncluding":"4.0","versionEndExcluding":"4.6.3","cpe_name":[]}]}]}},"legacy_mitre":{"record":{"CveYear":"2021","CveId":"32811","Ordinal":"208199","Title":"CVE-2021-32811","CVE":"CVE-2021-32811","Year":"2021"},"notes":[{"CveYear":"2021","CveId":"32811","Ordinal":"1","NoteData":"Zope is an open-source web application server. Zope versions prior to versions 4.6.3 and 5.3 have a remote code execution security issue. In order to be affected, one must use Python 3 for one's Zope deployment, run Zope 4 below version 4.6.3 or Zope 5 below version 5.3, and have the optional `Products.PythonScripts` add-on package installed. By default, one must have the admin-level Zope \"Manager\" role to add or edit Script (Python) objects through the web. Only sites that allow untrusted users to add/edit these scripts through the web are at risk. Zope releases 4.6.3 and 5.3 are not vulnerable. As a workaround, a site administrator can restrict adding/editing Script (Python) objects through the web using the standard Zope user/role permission mechanisms. Untrusted users should not be assigned the Zope Manager role and adding/editing these scripts through the web should be restricted to trusted users only. This is the default configuration in Zope.","Type":"Description","Title":null},{"CveYear":"2021","CveId":"32811","Ordinal":"2","NoteData":"2021-08-02","Type":"Other","Title":"Published"},{"CveYear":"2021","CveId":"32811","Ordinal":"3","NoteData":"2021-08-02","Type":"Other","Title":"Modified"}]}}}