EUVD-2026-66184
GHSA-pw57-w545-279f
Severity by source
AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N
XSS with scope change into the victim browser requires user interaction and high-complexity triggering conditions; no server-side availability impact and limited C/I match typical stored/reflected XSS bounds.
Primary rating from Vendor (drupal).
CVSS VectorVendor: drupal
Lifecycle Timeline
4DescriptionCVE.org
Improper Neutralization of Input During Web Page Generation ("Cross-site Scripting") vulnerability in Drupal Drupal core allows Cross-Site Scripting (XSS). This issue affects Drupal core versions: from 11.3.0 to 11.3.14, from 11.4.0 to 11.4.4, from 0.0.0 to 11.2.*.
AnalysisAI
Cross-site scripting in Drupal Core across all maintained 11.x release branches allows network-accessible unauthenticated attackers to inject malicious scripts into rendered web pages, with impact occurring in victims' browser contexts upon user interaction. High attack complexity (AC:H) constrains opportunistic exploitation, and all signals - EPSS at 0.15% (4th percentile), SSVC exploitation status of none, no KEV listing, and no public exploit code - converge on a low-urgency posture. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | User interaction is mandatory - the victim must browse to a page rendering the malicious payload (CVSS UI:R confirmed). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | All available signals indicate low urgency. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | The primary fix is to upgrade Drupal Core to version 11.3.14 or later (for sites on the 11.3.x branch) or version 11.4.4 or later (for sites on the 11.4.x branch), as detailed in vendor advisory https://www.drupal.org/sa-core-2026-011. … Detailed patch versions, workarounds, and compensating controls in full report. |
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External POC / Exploit Code
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