Is CVE-2019-6340 in the CISA KEV catalog?

Yes. CVE-2019-6340 is on the CISA Known Exploited Vulnerabilities list, added 2022-03-25.

What is the CVSS severity of CVE-2019-6340?

CVE-2019-6340 has a CVSS v3 base score of 8.1 (HIGH).

What is the EPSS score for CVE-2019-6340?

CVE-2019-6340 has an EPSS score of 92.02% (100th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2019-6340?

Upgrade drupal to 8.6.10 or later.

CVE & CISA-KEV Catalog

CVE-2019-6340

HIGHCISA KEVEPSS 100th pctl

8.1

CVSS v3

NVD

Description

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 web services module enabled, like JSON:API in Drupal 8, or Services or RESTful Web Services in Drupal 7. (Note: The Drupal 7 Services module itself does not require an update at this time, but you should apply other contributed updates associated with this advisory if Services is in use.)

CWE-502Deserialization of Untrusted Data

How to fix

Remediation Available

drupalNVD

Affected:>= 8.6.0, < 8.6.10Fixed in:8.6.10CVE-2019-6340derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

92.02%probability of exploitation in 30 days

100thpercentile

Very high risk: more likely to be exploited than 100% of all known CVEs.

Known Exploited Vulnerability (CISA KEV)

Drupal Core Remote Code Execution Vulnerability

In Drupal Core, some field types do not properly sanitize data from non-form sources. This can lead to arbitrary PHP code execution in some cases.

Apply updates per vendor instructions.

Remediation due: 2022-04-15

References

Patch1

exploit-db.com

Exploit2

Vendor Advisory1

drupal.org

Third-Party Advisory2

Government Resource1

cisa.gov

Related Vulnerabilities

Other CWE-502 (Deserialization of Untrusted Data) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-0669	High	7.2	100%	KEV + Ransom	Fix
CVE-2021-44228	Critical	10.0	100%	KEV + Ransom	Fix
CVE-2021-35464	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2023-29300	Critical	9.8	100%	KEV + Ransom	-
CVE-2025-53770	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2022-41082	High	8.0	100%	KEV + Ransom	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-11-07.