CVE-2017-6920

Description

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.

Category

9.8
CVSS
Severity: Critical
CVSS 3.0 •
CVSS 2.0 •
EPSS 67.68% Top 5%
Vendor Advisory drupal.org
Affected: Drupal.org Drupal Core
Published at:
Updated at:

References

Link Tags
https://www.drupal.org/forum/newsletters/security-advisories-for-drupal-core/2017-06-21/drupal-core-multiple patch vendor advisory
http://www.securityfocus.com/bid/99211 vdb entry third party advisory
http://www.securitytracker.com/id/1038781 vdb entry third party advisory

Frequently Asked Questions

What is the severity of CVE-2017-6920?
CVE-2017-6920 has been scored as a critical severity vulnerability.
How to fix CVE-2017-6920?
To fix CVE-2017-6920, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2017-6920 being actively exploited in the wild?
It is possible that CVE-2017-6920 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~68% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2017-6920?
CVE-2017-6920 affects Drupal.org Drupal Core.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.