CVE-2020-7940

Plone allows weak passwords

7.5 HighFix available

CVE-2020-7940 is a high vulnerability (CVSS 7.5) in Plone, published January 23, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.26%, the 69th percentile. Fixed in plone 4.3.20.

Missing password strength checks on some forms in Plone 4.3 through 5.2.0 allow users to set weak passwords, leading to easier cracking.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: High
Availability: None

Exploit likelihood

1.26%Up 0.2 points since Apr 14, 2021

What each source reports

NVD Score used 7.5

Missing password strength checks on some forms in Plone 4.3 through 5.2.0 allow users to set weak passwords, leading to easier cracking.

Record: CVE-2020-7940
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CVSS 2.0: 5.0 MediumAV:N/AC:L/Au:N/C:N/I:P/A:N
Weakness: CWE-521
Updated: 2026-11-02

CVE List No score

Missing password strength checks on some forms in Plone 4.3 through 5.2.0 allow users to set weak passwords, leading to easier cracking.

Record: CVE-2020-7940
Updated: 2026-11-02

EUVDEUVD-2020-0147 No score

Missing password strength checks on some forms in Plone 4.3 through 5.2.0 allow users to set weak passwords, leading to easier cracking.

Record: EUVD-2020-0147
Updated: 2026-11-03

GitHub AdvisoriesGHSA-cw58-gpgw-hwx2 8.7

Plone allows weak passwords

Missing password strength checks on some forms in Plone 4.3 through 5.2.0 allow users to set weak passwords, leading to easier cracking.

Record: GHSA-cw58-gpgw-hwx2
CVSS 4.0: 8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Weakness: CWE-521
Updated: 2026-11-02

OSV 7.5

Missing password strength checks on some forms in Plone 4.3 through 5.2.0 allow users to set weak passwords, leading to easier cracking.

Record: CVE-2020-7940
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Updated: 2026-11-02

OSVGHSA-cw58-gpgw-hwx2 8.7

Plone allows weak passwords

Missing password strength checks on some forms in Plone 4.3 through 5.2.0 allow users to set weak passwords, leading to easier cracking.

Record: GHSA-cw58-gpgw-hwx2
CVSS 4.0: 8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Weakness: CWE-521
Updated: 2026-11-02

OSVPYSEC-2020-89 No score

Missing password strength checks on some forms in Plone 4.3 through 5.2.0 allow users to set weak passwords, leading to easier cracking.

Record: PYSEC-2020-89
Updated: 2026-11-02

Affected products

plone

Affected packages

Affected packages
Package	Affected	Fixed
`plone` PyPI	4.3 up to 4.3.20	4.3.20
`plone` PyPI	5.0rc1 up to 5.1.7	5.1.7
`plone` PyPI	5.2.0 up to 5.2.2	5.2.2
`plone` PyPI	4.3 up to 4.3.20, plus listed versions 4.3.14.3.104.3.114.3.124.3.13 Show 14 moreShow less 4.3.144.3.154.3.164.3.174.3.184.3.194.3.24.3.34.3.44.3.54.3.64.3.74.3.84.3.9	4.3.20
`plone` PyPI	5.0rc1 up to 5.1.7, plus listed versions 5.05.0.15.0.105.0.25.0.3 Show 23 moreShow less 5.0.45.0.55.0.65.0.75.0.85.0.95.0rc25.0rc35.1.05.1.15.1.25.1.35.1.45.1.55.1.65.1a15.1a25.1b15.1b25.1b35.1b45.1rc15.1rc2	5.1.7
`plone` PyPI	5.2.0 up to 5.2.2, plus listed versions 5.2.1	5.2.2
`plone` PyPI	4.3 up to 5.2.1, plus listed versions 4.3.14.3.104.3.114.3.124.3.13 Show 45 moreShow less 4.3.144.3.154.3.164.3.174.3.184.3.194.3.24.3.204.3.34.3.44.3.54.3.64.3.74.3.84.3.95.05.0.15.0.105.0.25.0.35.0.45.0.55.0.65.0.75.0.85.0.95.0a15.0a25.0a35.0b15.0b25.0b35.0b45.0rc15.0rc25.0rc35.1.05.1.15.1.25.1.35.1.45.1.55.1.65.1.75.1a1	5.2.1

History

History
When	Changed	Sources
2026-11-03	aliases	EUVD
2026-11-02	created	CVE List, GitHub Advisories, NVD, OSV

References

This page doesn't list everything

Left out here: 16 versions. The JSON record has them.