The Media module comes with support for oEmbed. The oEmbed specification contains two discovery mechanisms, via providers.json and via URL discovery.
The URL discovery code could be leveraged to trick Drupal into making server-side requests to any URL.
This vulnerability affects the following application versions:
- Drupal 8.6.0
- Drupal 8.6.1
- Drupal 8.6.2
- Drupal 8.6.3
- Drupal 8.6.4
- Drupal 8.6.5
- Drupal 8.6.6
- Drupal 8.6.7
- Drupal 8.6.8
- Drupal 8.6.9
- Drupal 8.6.10
- Drupal 8.6.11
- Drupal 8.6.12
- Drupal 8.6.13
- Drupal 8.6.14
- Drupal 8.6.15
- Drupal 8.6.16
- Drupal 8.6.17
- Drupal 8.6.18
- Drupal 8.7.0
- Drupal 8.7.1
- Drupal 8.7.2
- Drupal 8.7.3
- Drupal 8.7.4
- Drupal 8.7.5
- Drupal 8.7.6
- Drupal 8.7.7
- Drupal 8.7.8
- Drupal 8.7.9
- Drupal 8.7.10
- Drupal 8.7.11
- Drupal 8.7.12
- Drupal 8.7.13
- Drupal 8.7.14
- Drupal 8.8.0
- Drupal 8.8.1
- Drupal 8.8.2
- Drupal 8.8.3
- Drupal 8.8.4
- Drupal 8.8.5
- Drupal 8.8.6
- Drupal 8.8.7
- Drupal 8.8.8
- Drupal 8.8.9
- Drupal 8.8.10
- Drupal 8.8.11
- Drupal 8.8.12
- Drupal 8.9.0
- Drupal 8.9.1
- Drupal 8.9.2
- Drupal 8.9.3
- Drupal 8.9.4
- Drupal 8.9.5
- Drupal 8.9.6
- Drupal 8.9.7
- Drupal 8.9.8
- Drupal 8.9.9
- Drupal 8.9.10
- Drupal 8.9.11
- Drupal 8.9.12
- Drupal 8.9.13
- Drupal 8.9.14
- Drupal 8.9.15
- Drupal 8.9.16
- Drupal 8.9.17
- Drupal 8.9.18
- Drupal 8.9.19
- Drupal 8.9.20
- Drupal 9.0.0
- Drupal 9.0.1
- Drupal 9.0.2
- Drupal 9.0.3
- Drupal 9.0.4
- Drupal 9.0.5
- Drupal 9.0.6
- Drupal 9.0.7
- Drupal 9.0.8
- Drupal 9.0.9
- Drupal 9.0.10
- Drupal 9.0.11
- Drupal 9.0.12
- Drupal 9.0.13
- Drupal 9.0.14
- Drupal 9.1.0
- Drupal 9.1.1
- Drupal 9.1.2
- Drupal 9.1.3
- Drupal 9.1.4
- Drupal 9.1.5
- Drupal 9.1.6
- Drupal 9.1.7
- Drupal 9.1.8
- Drupal 9.1.9
- Drupal 9.1.10
- Drupal 9.1.11
- Drupal 9.1.12
- Drupal 9.1.13
- Drupal 9.1.14
- Drupal 9.1.15
- Drupal 9.2.0
- Drupal 9.2.1
- Drupal 9.2.2
- Drupal 9.2.3
- Drupal 9.2.4
- Drupal 9.2.5
- Drupal 9.2.6
- Drupal 9.2.7
- Drupal 9.2.8
- Drupal 9.2.9
- Drupal 9.2.10
- Drupal 9.2.11
- Drupal 9.2.12
- Drupal 9.2.13
- Drupal 9.2.14
- Drupal 9.2.15
- Drupal 9.2.16
- Drupal 9.2.17
- Drupal 9.2.18
- Drupal 9.2.19
- Drupal 9.2.20
- Drupal 9.2.21
- Drupal 9.3.0
- Drupal 9.3.1
- Drupal 9.3.2
- Drupal 9.3.3
- Drupal 9.3.4
- Drupal 9.3.5
- Drupal 9.3.6
- Drupal 9.3.7
- Drupal 9.3.8
- Drupal 9.3.9
- Drupal 9.3.10
- Drupal 9.3.11
- Drupal 9.3.12
- Drupal 9.3.13
- Drupal 9.3.14
- Drupal 9.3.15
- Drupal 9.3.16
- Drupal 9.3.17
- Drupal 9.3.18
- Drupal 9.3.19
- Drupal 9.3.20
- Drupal 9.3.21
- Drupal 9.3.22
- Drupal 9.4.0
- Drupal 9.4.1
- Drupal 9.4.2
- Drupal 9.4.3
- Drupal 9.4.4
- Drupal 9.4.5
- Drupal 9.4.6
- Drupal 9.4.7
- Drupal 9.4.8
- Drupal 9.4.9
- Drupal 9.4.10
- Drupal 9.4.11
- Drupal 9.4.12
- Drupal 9.4.13
- Drupal 9.4.14
- Drupal 9.4.15
- Drupal 9.5.0
- Drupal 9.5.1
- Drupal 9.5.2
- Drupal 9.5.3
- Drupal 9.5.4
- Drupal 9.5.5
- Drupal 9.5.6
- Drupal 9.5.7
- Drupal 9.5.8
- Drupal 9.5.9
- Drupal 9.5.10
- Drupal 9.5.11
- Drupal 10.0.0
- Drupal 10.0.1
- Drupal 10.0.2
- Drupal 10.0.3
- Drupal 10.0.4
- Drupal 10.0.5
- Drupal 10.0.6
- Drupal 10.0.7
- Drupal 10.0.8
- Drupal 10.0.9
- Drupal 10.0.10
- Drupal 10.0.11
- Drupal 10.1.0
- Drupal 10.1.1
- Drupal 10.1.2
- Drupal 10.1.3
- Drupal 10.1.4
- Drupal 10.1.5
- Drupal 10.1.6
- Drupal 10.1.7
- Drupal 10.1.8
- Drupal 10.2.0
- Drupal 10.2.1
- Drupal 10.2.2
- Drupal 10.2.3
- Drupal 10.2.4
- Drupal 10.2.5
- Drupal 10.2.6
- Drupal 10.2.7
- Drupal 10.2.8
- Drupal 10.2.9
- Drupal 10.2.10
- Drupal 10.2.11
- Drupal 10.2.12
- Drupal 10.3.0
- Drupal 10.3.1
- Drupal 10.3.2
- Drupal 10.3.3
- Drupal 10.3.4
- Drupal 10.3.5
- Drupal 10.3.6
- Drupal 10.3.7
- Drupal 10.3.8
- Drupal 10.3.9
- Drupal 10.3.10
- Drupal 10.3.11
- Drupal 10.3.12
- Drupal 10.3.13
- Drupal 10.3.14
- Drupal 10.4.0
- Drupal 10.4.1
- Drupal 10.4.2
- Drupal 10.4.3
- Drupal 10.4.4
- Drupal 10.4.5
- Drupal 10.4.6
- Drupal 10.4.7
- Drupal 10.4.8
- Drupal 10.4.9
- Drupal 10.4.10
- Drupal 10.5.0
- Drupal 10.5.1
- Drupal 10.5.2
- Drupal 10.5.3
- Drupal 10.5.4
- Drupal 10.5.5
- Drupal 10.5.6
- Drupal 10.5.7
- Drupal 10.5.8
- Drupal 10.5.9
- Drupal 10.5.10
- Drupal 10.5.11
- Drupal 10.6.0
- Drupal 10.6.1
- Drupal 10.6.2
- Drupal 10.6.3
- Drupal 10.6.4
- Drupal 10.6.5
- Drupal 10.6.6
- Drupal 10.6.7
- Drupal 10.6.8
- Drupal 10.6.9
- Drupal 10.6.10
- Drupal 11.0.0
- Drupal 11.0.1
- Drupal 11.0.2
- Drupal 11.0.3
- Drupal 11.0.4
- Drupal 11.0.5
- Drupal 11.0.6
- Drupal 11.0.7
- Drupal 11.0.8
- Drupal 11.0.9
- Drupal 11.0.10
- Drupal 11.0.11
- Drupal 11.0.12
- Drupal 11.0.13
- Drupal 11.1.0
- Drupal 11.1.1
- Drupal 11.1.2
- Drupal 11.1.3
- Drupal 11.1.4
- Drupal 11.1.5
- Drupal 11.1.6
- Drupal 11.1.7
- Drupal 11.1.8
- Drupal 11.1.9
- Drupal 11.1.10
- Drupal 11.2.0
- Drupal 11.2.1
- Drupal 11.2.2
- Drupal 11.2.3
- Drupal 11.2.4
- Drupal 11.2.5
- Drupal 11.2.6
- Drupal 11.2.7
- Drupal 11.2.8
- Drupal 11.2.9
- Drupal 11.2.10
- Drupal 11.2.11
- Drupal 11.2.12
- Drupal 11.2.13
- Drupal 11.3.0
- Drupal 11.3.1
- Drupal 11.3.2
- Drupal 11.3.3
- Drupal 11.3.4
- Drupal 11.3.5
- Drupal 11.3.6
- Drupal 11.3.7
- Drupal 11.3.8
- Drupal 11.3.9
- Drupal 11.3.10
- Drupal 11.3.11