CVE-2019-6340 — Drupal Core Remote Code Execution Vulnerability

Some field types do not properly sanitize data from non-form sources in Drupal 8.5.x before 8.5.11 and Drupal 8.6.x before 8.6.10. This can lead to arbitrary PHP code execution in some cases. A site is only affected by this if one of the following conditions is met: The site has

01What is this vulnerability?

Some field types do not properly sanitize data from non-form sources in Drupal 8.5.x before 8.5.11 and Drupal 8.6.x before 8.6.10. This can lead to arbitrary PHP code execution in some cases. A site is only affected by this if one of the following conditions is met: The site has the Drupal 8 core RESTful Web Services (rest) module enabled and allows PATCH or POST requests, or the site has another…

02Affected products

Vendor	Product	Versions
Drupal	Drupal Core	8.5, 8.6

03Active exploitation status

Yes — actively exploited. Added to the CISA KEV catalog on 2022-03-25. Ransomware use: Unknown.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Open the Sigma generator with a pre-filled prompt for this CVE to draft a starting detection in your stack of choice:

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07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2019-02-21T21:00:00.000Z
• Last modified: 2025-10-21T23:45:43.200Z
• Added to CISA KEV: 2022-03-25
• BOD 22-01 due: 2022-04-15

09References

• www.synology.com — https://www.synology.com/security/advisory/Synology_SA_19_09
• www.exploit-db.com — https://www.exploit-db.com/exploits/46452/
• www.drupal.org — https://www.drupal.org/sa-core-2019-003
• www.exploit-db.com — https://www.exploit-db.com/exploits/46510/
• www.securityfocus.com — http://www.securityfocus.com/bid/107106
• www.exploit-db.com — https://www.exploit-db.com/exploits/46459/