Security readout for executives and security teams
Plain-English summary
Drupal sites on the listed core branches are vulnerable to cross-site scripting because the AJAX API left JSONP enabled by default. In business terms, an attacker may be able to run unwanted browser-side script against users of an affected site. The sources do not provide CVSS severity or evidence of active exploitation.
Executive priority
Prioritize remediation for internet-facing Drupal sites and administrator-facing portals. The absence of KEV evidence lowers emergency urgency, but XSS in a CMS can still create account, data, and trust risks if exposed.
Technical view
CVE-2020-13666 affects Drupal Core 7.x before 7.73, 8.8.x before 8.8.10, 8.9.x before 8.9.6, and 9.0.x before 9.0.6. The issue is an XSS condition in the Drupal AJAX API related to JSONP not being disabled by default.
Likely exposure
Exposure is most likely for public or authenticated Drupal sites running the affected core versions, especially where Drupal AJAX functionality is reachable by users. The bundle does not identify affected modules, configurations, or exact request paths.
Exploitation context
The provided sources identify the vulnerability class and affected versions, but do not cite active exploitation. The CVE is not marked as KEV in the supplied bundle, so active exploitation should not be assumed from this evidence.
Researcher notes
Evidence is strongest for affected version ranges and the general XSS cause. The bundle lacks CVSS, CWE, exploit telemetry, and detailed preconditions. Avoid assuming exploit maturity or specific impact beyond Drupal's stated XSS issue.
Mitigation direction
- Upgrade Drupal 7.x sites to 7.73 or later.
- Upgrade Drupal 8.8.x sites to 8.8.10 or later.
- Upgrade Drupal 8.9.x sites to 8.9.6 or later.
- Upgrade Drupal 9.0.x sites to 9.0.6 or later.
- Review the Drupal advisory for any site-specific guidance.
Validation and detection
- Inventory all Drupal sites and record exact core versions.
- Confirm no production site runs an affected pre-fix version.
- Check vendor advisory tracking for completed remediation evidence.
- Regression-test normal AJAX workflows after upgrading.
- Review security monitoring for suspicious XSS-related browser activity.
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.
CVE-2020-13666 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
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://www.drupal.org/sa-core-2020-007CVE reference · x_refsource_CONFIRM
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.