What is CVE-2019-6340?

CVE-2019-6340 is a high-severity vulnerability in Drupal, classified under Deserialization of Untrusted Data. CVSS score: 8.1/10. Published 2019-02-21.

How severe is CVE-2019-6340?

High severity. CVSS v3 base score is 8.1 out of 10.

Is CVE-2019-6340 known to be exploited?

Yes. CVE-2019-6340 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-03-25), indicating it is being actively exploited. 87 public proof-of-concept repositories are indexed.

Deserialization in Drupal

CVE-2019-6340

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 f…

Vulnerability class: Insecure Deserialization

EPSS: 0.920 (99.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Drupal
Drupal Core — versions 8.5, 8.6

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2022-03-25. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2022-04-15.

Required action: Apply updates per vendor instructions.

Public proof-of-concept exploits

References

mlhess@drupal.org (x_refsource_CONFIRM, Third Party Advisory)
mlhess@drupal.org (Patch, VDB Entry, Third Party Advisory, exploit, x_refsource_EXPLOIT-DB)
mlhess@drupal.org (x_refsource_CONFIRM, Mitigation, Vendor Advisory)
mlhess@drupal.org (Exploit, Third Party Advisory, exploit, x_refsource_EXPLOIT-DB)
mlhess@drupal.org (VDB Entry, Third Party Advisory, vdb-entry, Broken Link, x_refsource_BID)
mlhess@drupal.org (Exploit, VDB Entry, Third Party Advisory, exploit, x_refsource_EXPLOIT-DB)
134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)

Frequently asked questions

What is CVE-2019-6340?: CVE-2019-6340 is a high-severity vulnerability in Drupal, classified under Deserialization of Untrusted Data. CVSS score: 8.1/10. Published 2019-02-21.
How severe is CVE-2019-6340?: High severity. CVSS v3 base score is 8.1 out of 10.
Is CVE-2019-6340 known to be exploited?: Yes. CVE-2019-6340 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-03-25), indicating it is being actively exploited. 87 public proof-of-concept repositories are indexed.