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Vulnerability record · CVE-2020-36388 · published 17 June 2021

CVE-2020-36388: Civicrm unrestricted file upload vulnerability

Civicrm · Civicrm

In CiviCRM before 5.21.3 and 5.22.x through 5.24.x before 5.24.3, users may be able to upload and execute a crafted PHAR archive.

8.8 CVSS 3.1 High EPSS 1.5% · top 27.2% CWE-434 · Unrestricted file upload
8.8CVSS 3.1 base score, v2 6.5
1.5%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 5.21.3 and 5.22.x through 5.24.x before 5.24.3, users may be able to upload and execute a crafted PHAR archive.

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

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-2020-03 Vendor Advisory
https://blog.sonarsource.com/civicrm-code-execution-vulnerability-chain-explained/ ExploitThird Party Advisory
https://civicrm.org/advisory/civi-sa-2020-03 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-2020-36388), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.