Servers and applications
CVE-2017-6920
Drupal core 8 before versions 8.3.4 allows remote attackers to execute arbitrary code due to the PECL YAML parser not handling PHP objects safely during certain operations.
- Severity
- Critical 9.8
- Published
- 6 Aug 2018
- Last changed
- 17 Jun 2026
- Added to UpHeron
- 1 Nov 2026
- Fixed in
- 8.3.4
- Exploit chance
- 20% in the next 30 daysHigher than 97% of CVEs. EPSS by FIRST, 10 Nov 2026
- Weakness
- CWE-19
- Attack
- Over the network · No login needed · No user action needed
- Attacker can
- Read data · Change data · Take it down
- CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H- Sources
- NVD
Affected software
| Software | Affected versions |
|---|---|
DrupalServers and applications · cpe:a:drupal:drupal |
|