Security readout for executives and security teams
Plain-English summary
CVE-2019-6340 is a Drupal core remote code execution flaw. Some exposed Drupal web service configurations could let an unauthenticated attacker execute PHP code. The issue affects Drupal 8.5.x before 8.5.11 and 8.6.x before 8.6.10 when specific REST or web services conditions are present.
Executive priority
Treat internet-facing affected Drupal systems as urgent. The combination of remote code execution, unauthenticated attack surface, public exploit references, and CISA KEV status creates material business risk where advisory conditions are met.
Technical view
Drupal did not properly sanitize data from non-form sources for some field types. Exposure requires Drupal core REST with PATCH or POST enabled, or another web services module such as JSON:API, Services, or RESTful Web Services. The CVE is categorized as CWE-502 and scored CVSS 8.1 high.
Likely exposure
Highest risk is internet-facing Drupal 8.5 or 8.6 sites with REST, JSON:API, Services, or similar web services enabled. Sites without these web service paths are less likely affected, based on the advisory conditions.
Exploitation context
CISA lists CVE-2019-6340 in the Known Exploited Vulnerabilities catalog, so active exploitation is supported. Exploit-DB references also indicate public exploit material exists, but this assessment does not rely on or describe exploit mechanics.
Researcher notes
The source bundle confirms affected Drupal core branches and conditional exposure, but does not prove every Drupal 7 Services deployment is affected. Validate module state, request methods, and Drupal core version before assigning exposure.
Mitigation direction
- Upgrade Drupal 8.5.x to 8.5.11 or later.
- Upgrade Drupal 8.6.x to 8.6.10 or later.
- Review Drupal SA-CORE-2019-003 for current vendor guidance.
- Disable unnecessary REST or web services modules where possible.
- Restrict PATCH and POST access to exposed web service endpoints.
Validation and detection
- Inventory Drupal sites and confirm exact core versions.
- Check whether REST, JSON:API, Services, or RESTful Web Services are enabled.
- Verify whether PATCH or POST requests are allowed to REST endpoints.
- Review logs for suspicious web service requests around exposed endpoints.
- Confirm remediation by rechecking version and module configuration.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-502: Code execution behavior lookup
Code execution and unsafe deserialization weaknesses often justify reviewing execution behavior and process telemetry. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2019-6340 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 8.1 (3.1)
- Known Exploited
- Yes
- Published
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CISA KEV status
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H2.25.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.1HighVector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.synology.com/security/advisory/Synology_SA_19_09CVE reference · x_refsource_CONFIRM
- 46452CVE reference · exploit, x_refsource_EXPLOIT-DB
- https://www.drupal.org/sa-core-2019-003CVE reference · x_refsource_CONFIRM
- 46510CVE reference · exploit, x_refsource_EXPLOIT-DB
- 46459CVE reference · exploit, x_refsource_EXPLOIT-DB
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-6340CVE reference · government-resource
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Deserialization of Untrusted Data
Deserialization of Untrusted Data represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.