Plone Unauthenticated Write Vulnerability

published 2020-01-23 6 y ago modified 2026-09-10 59 d ago also GHSA-w6g9-xccc-347h , PYSEC-2020-90 , PYSEC-2026-459 , EUVD-2020-0148

cvss: 9.8; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 2.3%; EPSS 2.3% chance of exploitation in 30 days, percentile 83%
public exploits: 0; none known

A privilege escalation issue in plone.app.contenttypes in Plone 4.3 through 5.2.1 allows users to PUT (overwrite) some content without needing write permission.

Patch / fix

fixed in 2

pypi plone 5.2.2
pypi plone-app-contenttypes 2.1.6

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-7941 updated 2026-11-04 cvss 9.8

plone: privilege escalation for overwriting content without needing write permission

Red Hat Enterprise Linux 5 conga
affected: no fix planned “Out of support scope”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

2.27% chance of exploitation in the next 30 days, higher than 83% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	7.5	AV:N/AC:L/Au:N/C:P/I:P/A:P
OSV	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
GitHub	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem	package	affected	fixed in
pypi	plone	>=4.3, <=5.2.1 >=4.3, <5.2.2	5.2.2
pypi	plone-app-contenttypes	all versions <2.1.6	2.1.6

Classification

Weakness

CWE-269 Improper Privilege Management

References

plone.org /security/hotfix/20200121
web, vendor-advisory
plone.org /security/hotfix/20200121/privilege-escalation-for-overwriting-content
web, vendor-advisory
openwall.com /lists/oss-security/2020/01/22/1
web, mailing-list, third-party-advisory
openwall.com /lists/oss-security/2020/01/24/1
mailing-list, web, third-party-advisory
nvd.nist.gov /vuln/detail/CVE-2020-7941
advisory
github.com /plone/plone.app.contenttypes
package
github.com /plone/plone.app.contenttypes/blob/master/CHANGES.rst?plain=1#L372-L374
web
github.com /pypa/advisory-database/tree/main/vulns/plone/PYSEC-2020-90.yaml
web
pypi.org /project/plone-app-contenttypes
package
github.com /advisories/GHSA-w6g9-xccc-347h
advisory

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary