Read the docs

Cross-site scripting in Drupal Stage File Proxy

Priority LOW 34CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-79.

Summary

Cross-site scripting (CWE-79) in Drupal Stage File Proxy results from improper neutralization of input during web page generation. Affected versions are from 0.0.0 before 3.1.7 and from 4.0.0 before 4.0.1. The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N) describes a network attack of low complexity that needs no privileges or user interaction, with low confidentiality and integrity impact and no availability impact.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Description from the CNA

Improper Neutralization of Input During Web Page Generation ("Cross-site Scripting") vulnerability in Drupal Stage File Proxy allows Cross-Site Scripting (XSS). This issue affects Stage File Proxy versions: from 0.0.0 to 3.1.7, from 4.0.0 to 4.0.1.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00173 6th percentileScored 2026-11-07
Fix Fixed Stage File Proxy (Drupal): 3.1.7, 4.0.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
DrupalStage File Proxy0.0.0 to before 3.1.7; 4.0.0 to before 4.0.13.1.7, 4.0.1Patch availableCNA
  • Stage File Proxy VendorDrupal Affected 0.0.0 to before 3.1.7; 4.0.0 to before 4.0.1 Fixed in 3.1.7, 4.0.1 Patch available CNA

Remediation

Upgrade Drupal Stage File Proxy to version 3.1.7 or 4.0.1.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

  • Fix · CNA Stage File Proxy (Drupal) Fixed in 3.1.7, 4.0.1

Timeline

  1. 2026-10-30 Threatist record created from CVE-2026-118576
  2. 2026-10-30 Alias added: GHSA-qrww-563x-vvf9
  3. 2026-11-06 CVSS score added · CISA ADP
  4. 2026-11-06 CISA SSVC decision points changed

References

  • TI-2026-07979 Drupal core - Highly critical - SQL injection - SA-CORE-2026-004 KEVCVSS 3.1CRITICAL 9.8
  • TI-2018-05494 Drupal core - Highly critical - Remote Code Execution - SA-CORE-2018-004 KEVCVSS 3.1CRITICAL 9.8
  • TI-2018-05493 Improper input validation in Drupal before 7.58, 8.x before 8.3.9, 8.4.x before 8.4.6… KEVCVSS 3.1CRITICAL 9.8
  • TI-2020-10731 Unrestricted file upload in Drupal Core KEVCVSS 3.1HIGH 8.8
  • TI-2019-04505 Drupal core - Highly critical - Remote Code Execution KEVCVSS 3.1HIGH 8.1
  • TI-2020-17477 Archive_Tar through 1.4.10 has :// filename sanitization only to address phar attacks… KEVCVSS 3.1HIGH 7.8
See all 941 →

Sources