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CVE-2020-13665: Drupal Core Access bypass vulnerability

critical Affects drupal/core, drupal/drupal, drupal/core. Feed 2026.10.29.4, updated 2026-10-29; published ; advisory modified .

Drupal Core Access bypass vulnerability

Package
drupal/core Composer
Affected versions
>=8.8.0 and <8.8.8 or >=8.9.0 and <8.9.1 or >=9.0.0 and <9.0.1 or >=8.0.0 and <8.1.0 or >=8.1.0 and <8.2.0 or >=8.2.0 and <8.3.0 or >=8.3.0 and <8.4.0 or >=8.4.0 and <8.5.0 or >=8.5.0 and <8.6.0 or >=8.6.0 and <8.7.0 or >=8.7.0 and <8.8.0
Fixed in
8.8.8, 8.9.1, 9.0.1
Severity
critical  CVSS 9.8
Exploitation
not on CISA KEV · EPSS 1% (69.8th percentile)
Published
2022-05-24
Source
osv.dev

References

Drupal Core Access bypass vulnerability

Package
drupal/drupal Composer
Affected versions
>=8.8.0 and <8.8.8 or >=8.9.0 and <8.9.1 or >=9.0.0 and <9.0.1 or >=8.0.0 and <8.1.0 or >=8.1.0 and <8.2.0 or >=8.2.0 and <8.3.0 or >=8.3.0 and <8.4.0 or >=8.4.0 and <8.5.0 or >=8.5.0 and <8.6.0 or >=8.6.0 and <8.7.0 or >=8.7.0 and <8.8.0
Fixed in
8.8.8, 8.9.1, 9.0.1
Severity
critical  CVSS 9.8
Exploitation
not on CISA KEV · EPSS 1% (69.8th percentile)
Published
2022-05-24
Source
osv.dev

References

JSON:API PATCH requests may bypass validation for certain fields. By default, JSON:API works in a read-only mode which

Package
drupal/core Composer
Affected versions
>= 8.0.0 <8.8.8 or >= 8.9.0 <8.9.1 or >=9.0.0 <9.0.1
Fixed in
8.8.8, 8.9.1, 9.0.1
Severity
unknown
Exploitation
not on CISA KEV
Published
2020-06-17
Source
osv.dev

References

CWE-863
NVD recorddrupal/core advisoriesdrupal/drupal advisoriesdrupal/core advisories

Am I affected?

Find out in one command. phpwarden checks your composer.lock against this advisory and 20,000+ others, ranked by real-world exploitation (CISA KEV + EPSS). Free, offline, open data.

# PHP projects (recommended)
composer require --dev phpwarden/phpwarden
# then
vendor/bin/phpwarden deps composer.lock

# or, without Composer
pipx install phpwarden   &&   phpwarden deps composer.lock

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