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TI-2026-79086 Aliases CVE-2026-87939GHSA-cw7v-hw53-2792

Stored cross-site scripting in Drupal Feed Block

Priority LOW 19CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
High
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

Drupal Feed Block versions from 0.0.0 before 2.0.2 and from 3.0.0 before 3.0.2 are affected. Improper neutralization of input during web page generation (CWE-79) allows stored cross-site scripting. A user with low privileges can store malicious script that runs in other users' browsers, and the attack needs no user interaction.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

Improper Neutralization of Input During Web Page Generation ("Cross-site Scripting") vulnerability in Drupal Feed Block allows Stored XSS. This issue affects Feed Block versions: from 0.0.0 to 2.0.2, from 3.0.0 to 3.0.2.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00198 9th percentileScored 2026-11-07
Fix Fixed Feed Block (Drupal): 2.0.2, 3.0.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
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
DrupalFeed Block0.0.0 to before 2.0.2; 3.0.0 to before 3.0.22.0.2, 3.0.2Patch availableCNA
  • Feed Block VendorDrupal Affected 0.0.0 to before 2.0.2; 3.0.0 to before 3.0.2 Fixed in 2.0.2, 3.0.2 Patch available CNA

Remediation

Upgrade Feed Block to version 2.0.2 or 3.0.2, which are the fixed versions for their respective branches.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

  • Fix · CNA Feed Block (Drupal) Fixed in 2.0.2, 3.0.2

Timeline

  1. 2026-10-22 Threatist record created from CVE-2026-87939
  2. 2026-10-22 Alias added: GHSA-cw7v-hw53-2792
  3. 2026-10-22 CVSS score added · CISA ADP
  4. 2026-10-22 CISA SSVC decision points changed

References

Other 1

  • 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

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences