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Vulnerability record · CVE-2020-36389 · published 17 June 2021

CVE-2020-36389: Civicrm cross-site request forgery vulnerability

Civicrm · Civicrm

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

4.3 CVSS 3.1 Medium EPSS 0.66% · top 50.4% CWE-352 · Cross-site request forgery
4.3CVSS 3.1 base score, v2 4.3
0.66%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

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

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://blog.sonarsource.com/civicrm-code-execution-vulnerability-chain-explained/ ExploitThird Party Advisory
https://civicrm.org/advisory/civi-sa-2020-11-csrf-ckeditor-configuration-form Vendor Advisory
https://blog.sonarsource.com/civicrm-code-execution-vulnerability-chain-explained/ ExploitThird Party Advisory
https://civicrm.org/advisory/civi-sa-2020-11-csrf-ckeditor-configuration-form Vendor Advisory

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2020-36389), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.