Vulnerability in Drupal
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.
EPSS: 0.205 (97.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Drupal
- Drupal.org Drupal Core — versions 8 prior to 8.3.4
Weakness classification (CWE)
Public proof-of-concept exploits
References
- mlhess@drupal.org (x_refsource_CONFIRM, Patch, Vendor Advisory)
- mlhess@drupal.org (VDB Entry, Third Party Advisory, vdb-entry, x_refsource_BID)
- mlhess@drupal.org (VDB Entry, Third Party Advisory, vdb-entry, x_refsource_SECTRACK)
Frequently asked questions
- What is CVE-2017-6920?
- CVE-2017-6920 is a critical-severity vulnerability in Drupal, classified under CWE-19. CVSS score: 9.8/10. Published 2018-08-06.
- How severe is CVE-2017-6920?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2017-6920 known to be exploited?
- 18 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.