Skip to content
Fencer Vulns
high 8.8

CVE-2020-13664 json

Drupal Core Arbitrary PHP code execution vulnerability

published 2020-06-17 6 y ago modified 2026-09-19 50 d ago also BIT-drupal-2020-13664 , DRUPAL-CORE-2020-005 , EUVD-2022-5732 , GHSA-x72f-ggjw-v5xh

cvss
8.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.0%
EPSS 3.0% chance of exploitation in 30 days, percentile 87%
public exploits
0
none known

Summary

Arbitrary PHP code execution vulnerability in Drupal Core under certain circumstances. An attacker could trick an administrator into visiting a malicious site that could result in creating a carefully named directory on the file system. With this directory in place, an attacker could attempt to brute force a remote code execution vulnerability. Windows servers are most likely to be affected. This issue affects: Drupal Drupal Core 8.8.x versions prior to 8.8.8; 8.9.x versions prior to 8.9.1; 9.0.1 versions prior to 9.0.1.

Patch / fix

  • packagist drupal/core 8.8.8, 8.9.1, 9.0.1
  • packagist drupal/drupal 8.8.8, 8.9.1, 9.0.1
  • bitnami drupal 8.8.8, 8.9.1, 9.0.1
  • Drupal Drupal Core 8.8.8, 8.9.1

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-2020-13664 updated cvss 7.5

drupal: Arbitrary PHP code execution vulnerability

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

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

2.98% chance of exploitation in the next 30 days, higher than 87% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
GitHub 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD 2.0 9.3 AV:N/AC:M/Au:N/C:C/I:C/A:C
OSV 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
packagist drupal/core
>=8.8.0, <8.8.8
>=8.9.0, <8.9.1
>=9.0.0, <9.0.1
>=8.0.0, <8.8.8
8.8.8
8.9.1
9.0.1
packagist drupal/drupal
>=8.8.0, <8.8.8
>=8.9.0, <8.9.1
>=9.0.0, <9.0.1
8.8.8
8.9.1
9.0.1
bitnami drupal
>=8.8.0, <8.8.8
>=8.9.0, <8.9.1
>=9.0.0, <9.0.1
8.8.8
8.9.1
9.0.1

Affected products

  • Drupal Drupal Core

Classification

Weakness
  • CWE-77 Improper Neutralization of Special Elements used in a Command

References

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.