# Plone vulnerabilities

Source: https://junglewise.ai/threats/technologies/plone  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 10 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/technologies/plone.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 8 vulnerabilities in Plone: 0 in the last 7 days and 0 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2021-33507, was published on 9 July 2026.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 0
- All time: 8 (0 critical, 0 exploited in the wild)

## About Plone

Open-source Python-based content management system for building web applications and portals.

## Latest Plone vulnerabilities

- [CVE-2021-33507: PYSEC-2026-2967 - Cross-site scripting in Products.CMFCore, Products.PluggableAuthService, Plone](https://junglewise.ai/threats/cve-2021-33507-plone-reflected-cross-site-scripting-vulnerability) (low, CVSS 3.1, published 9 Jul 2026)
- [CVE-2011-1950: PYSEC-2026-2888 - Plone and plone.app.users allow remote authenticated users to modify the properties of arbitrary accounts](https://junglewise.ai/threats/cve-2011-1950-plone-privilege-escalation-in-account-property-modification) (low, CVSS 3.1, published 9 Jul 2026)
- [CVE-2020-28736: PYSEC-2026-735 - Improper Restriction of XML External Entity Reference in Plone](https://junglewise.ai/threats/cve-2020-28736-plone-xml-external-entity-injection-in-schema-editor) (low, CVSS 3.1, published 2 Jul 2026)
- [CVE-2021-29002: Plone CMS stored cross-site scripting in site control panel](https://junglewise.ai/threats/cve-2021-29002-plone-cms-stored-cross-site-scripting-in-site-control-panel) (low, CVSS 3.1, published 24 Mar 2021)
- [CVE-2016-7136: Plone CMS cross-site scripting in forms](https://junglewise.ai/threats/cve-2016-7136-plone-cms-cross-site-scripting-in-forms) (low, CVSS 3, published 7 Mar 2017)
- [CVE-2012-5500: Plone cross-site request forgery in batch rename script](https://junglewise.ai/threats/cve-2012-5500-plone-cross-site-request-forgery-in-batch-rename-script) (low, CVSS 3.1, published 3 Nov 2014)
- [CVE-2012-5494: Plone cross-site scripting in python_scripts](https://junglewise.ai/threats/cve-2012-5494-plone-cross-site-scripting-in-python-scripts) (low, CVSS 3.1, published 30 Sep 2014)
- [CVE-2012-5493: Plone sandbox bypass via gtbn.py](https://junglewise.ai/threats/cve-2012-5493-plone-sandbox-bypass-via-gtbn-py) (low, CVSS 3.1, published 30 Sep 2014)

## Most severe Plone vulnerabilities

- [CVE-2011-1950: PYSEC-2026-2888 - Plone and plone.app.users allow remote authenticated users to modify the properties of arbitrary accounts](https://junglewise.ai/threats/cve-2011-1950-plone-privilege-escalation-in-account-property-modification) (low, CVSS 3.1, published 9 Jul 2026)
- [CVE-2012-5493: Plone sandbox bypass via gtbn.py](https://junglewise.ai/threats/cve-2012-5493-plone-sandbox-bypass-via-gtbn-py) (low, CVSS 3.1, published 30 Sep 2014)
- [CVE-2020-28736: PYSEC-2026-735 - Improper Restriction of XML External Entity Reference in Plone](https://junglewise.ai/threats/cve-2020-28736-plone-xml-external-entity-injection-in-schema-editor) (low, CVSS 3.1, published 2 Jul 2026)
- [CVE-2012-5494: Plone cross-site scripting in python_scripts](https://junglewise.ai/threats/cve-2012-5494-plone-cross-site-scripting-in-python-scripts) (low, CVSS 3.1, published 30 Sep 2014)
- [CVE-2012-5500: Plone cross-site request forgery in batch rename script](https://junglewise.ai/threats/cve-2012-5500-plone-cross-site-request-forgery-in-batch-rename-script) (low, CVSS 3.1, published 3 Nov 2014)
- [CVE-2021-33507: PYSEC-2026-2967 - Cross-site scripting in Products.CMFCore, Products.PluggableAuthService, Plone](https://junglewise.ai/threats/cve-2021-33507-plone-reflected-cross-site-scripting-vulnerability) (low, CVSS 3.1, published 9 Jul 2026)
- [CVE-2021-29002: Plone CMS stored cross-site scripting in site control panel](https://junglewise.ai/threats/cve-2021-29002-plone-cms-stored-cross-site-scripting-in-site-control-panel) (low, CVSS 3.1, published 24 Mar 2021)
- [CVE-2016-7136: Plone CMS cross-site scripting in forms](https://junglewise.ai/threats/cve-2016-7136-plone-cms-cross-site-scripting-in-forms) (low, CVSS 3, published 7 Mar 2017)

## Vulnerabilities per week

Nothing was published in the last eight weeks.

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 0 | 0 | 0 |
| 24 Aug 2026 | 0 | 0 | 0 |
| 31 Aug 2026 | 0 | 0 | 0 |
| 7 Sep 2026 | 0 | 0 | 0 |
| 14 Sep 2026 | 0 | 0 | 0 |
| 21 Sep 2026 | 0 | 0 | 0 |
| 28 Sep 2026 | 0 | 0 | 0 |
| 5 Oct 2026 | 0 | 0 | 0 |
| 12 Oct 2026 | 0 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 0 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## Other Plone technologies

- [Plone Volto](https://junglewise.ai/threats/technologies/volto): 3 vulnerabilities

## Sources

NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "Plone vulnerabilities", https://junglewise.ai/threats/technologies/plone, 10 November 2026.