CVE-2020-13663

Cross Site Request Forgery vulnerability in Drupal Core Form API does not properly handle certain form input from cross-site requests, which can lead to other vulnerabilities.

Published: 2021-06-11 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2020-13663 is rated Moderate Risk (52.5/100): CVSS High severity, with low exploitation likelihood (EPSS 0.69%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2020-13663

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.22% 0.69% +0.47%
2 2025-03-30 0.31% 0.22% -0.09%
3 2025-03-29 — 0.31% —

Full EPSS history (9 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2020-13663

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.8 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 5.9 [email protected]
6.8 2.0 MEDIUM
AV:N/AC:M/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.6 6.4 [email protected]

Weakness enumeration for CVE-2020-13663

GitHub Security Advisory for CVE-2020-13663

GHSA-m648-hpf8-qcjw · Severity: high · Ecosystem: composer — Drupal Core Cross-Site Request Forgery (CSRF) vulnerability

OS Trackers for CVE-2020-13663

vendor priority summary link
alpine high CVE-2020-13663: 1 source package rows (drupal7); 5 state rows across 5 repos (3.17-community, 3.18-community, 3.19-community, 3.20-community, edge-community); fixed 5, open 0. https://security.alpinelinux.org/vuln/CVE-2020-13663
ubuntu medium CVE-2020-13663 medium priority: Ubuntu including 1 source packages (drupal7), 17 status rows across 17 suites (bionic, eoan, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): DNE 14, needed 2, needs-triage 1. https://ubuntu.com/security/CVE-2020-13663

Affected software / configurations for CVE-2020-13663

Vendor Product Version Raw CPE
drupal drupal >= 7.0, < 7.72 cpe:2.3:a:drupal:drupal:*:*:*:*:*:*:*:*
drupal drupal >= 8.8.0, < 8.8.8 cpe:2.3:a:drupal:drupal:*:*:*:*:*:*:*:*
drupal drupal >= 8.9.0, < 8.9.1 cpe:2.3:a:drupal:drupal:*:*:*:*:*:*:*:*
drupal drupal >= 9.0.0, < 9.0.1 cpe:2.3:a:drupal:drupal:*:*:*:*:*:*:*:*

References for CVE-2020-13663

URL Tags
https://www.drupal.org/sa-core-2020-004 Vendor Advisory
cvelogic Threat Intelligence