CVE-2020-36389

In CiviCRM before 5.28.1 and CiviCRM ESR before 5.27.5 ESR, the CKEditor configuration form...

4.3 MediumFix available

CVE-2020-36389 is a medium vulnerability (CVSS 4.3) in Civicrm, published June 17, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.66%, the 52nd percentile. Fixed in civicrm 5.27.5.

What does this mean?

Severity: 4.3 MediumCVSS 3.1, NVD
Exploit chance: 0.66%EPSS, 52nd percentile
Exploitation: None knownNot on CISA’s or ENISA’s lists
Fixed in: 5.27.5civicrm +4 more

Description

In CiviCRM before 5.28.1 and CiviCRM ESR before 5.27.5 ESR, the CKEditor configuration form allows CSRF.

Attack profile

How easy it is to exploit

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

What an attacker can affect

Confidentiality: None
Integrity: Low
Availability: None

Exploit likelihood

0.66%Up 0.2 points since Jun 19, 2021

Affected products

civicrm

Affected packages

Affected packages
Package	Affected	Fixed
`civicrm` Bitnami	before 5.27.5, before 5.28.1	5.27.55.28.1
`civicrm` Debian:11	before 5.28.4+dfsg1-1	5.28.4+dfsg1-1
`civicrm` Ubuntu:Pro:16.04:LTS	All versions, plus listed versions 4.7.1+dfsg-14.7.1+dfsg-24.7.1+dfsg-2ubuntu14.7.1+dfsg-2ubuntu1+esm1	None known
`civicrm` Ubuntu:Pro:18.04:LTS	All versions, plus listed versions 4.7.23+dfsg-1ubuntu14.7.24+dfsg-1ubuntu14.7.30+dfsg-1ubuntu14.7.30+dfsg-1ubuntu1+esm1	None known
`civicrm` Ubuntu:Pro:20.04:LTS	All versions, plus listed versions 5.11.0+dfsg-15.18.1+dfsg-15.20.3+dfsg-15.21.0+dfsg-15.21.1+dfsg-15.21.2+dfsg-15.21.2+dfsg-1ubuntu0.1~esm1	None known

What each source reports

NVD Score used4.3

In CiviCRM before 5.28.1 and CiviCRM ESR before 5.27.5 ESR, the CKEditor configuration form allows CSRF.

Record: CVE-2020-36389
CVSS 3.1: 4.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
CVSS 2.0: 4.3 MediumAV:N/AC:M/Au:N/C:N/I:P/A:N
Weakness: CWE-352
Updated: 2026-11-02

CVE ListNo score

In CiviCRM before 5.28.1 and CiviCRM ESR before 5.27.5 ESR, the CKEditor configuration form allows CSRF.

Record: CVE-2020-36389
Updated: 2026-11-02

EUVDEUVD-2020-23920No score

In CiviCRM before 5.28.1 and CiviCRM ESR before 5.27.5 ESR, the CKEditor configuration form allows CSRF.

Record: EUVD-2020-23920
Updated: 2026-11-03

GitHub AdvisoriesGHSA-pxgv-6gmm-ggxw4.3

In CiviCRM before 5.28.1 and CiviCRM ESR before 5.27.5 ESR, the CKEditor configuration form...

In CiviCRM before 5.28.1 and CiviCRM ESR before 5.27.5 ESR, the CKEditor configuration form allows CSRF.

Record: GHSA-pxgv-6gmm-ggxw
CVSS 3.1: 4.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Weakness: CWE-352
Updated: 2026-11-02

OSV4.3

In CiviCRM before 5.28.1 and CiviCRM ESR before 5.27.5 ESR, the CKEditor configuration form allows CSRF.

Record: CVE-2020-36389
CVSS 3.1: 4.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Updated: 2026-11-02

OSVDEBIAN-CVE-2020-363894.3

In CiviCRM before 5.28.1 and CiviCRM ESR before 5.27.5 ESR, the CKEditor configuration form allows CSRF.

Record: DEBIAN-CVE-2020-36389
CVSS 3.1: 4.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Updated: 2026-11-02

OSVUBUNTU-CVE-2020-363894.3

In CiviCRM before 5.28.1 and CiviCRM ESR before 5.27.5 ESR, the CKEditor configuration form allows CSRF.

Record: UBUNTU-CVE-2020-36389
CVSS 3.1: 4.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Updated: 2026-11-02

OSVBIT-civicrm-2020-36389No score

In CiviCRM before 5.28.1 and CiviCRM ESR before 5.27.5 ESR, the CKEditor configuration form allows CSRF.

Record: BIT-civicrm-2020-36389
Updated: 2026-11-02

History

History
Recorded	Changed	Sources
Nov 10, 2026	facts
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

Description

Attack profile

How easy it is to exploit

What an attacker can affect

Exploit likelihood

Affected products

Affected packages

What each source reports

History

References