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TI-2026-84815 Aliases CVE-2026-115541

Stored cross-site scripting in HumHub friendship confirmation dialog

Priority LOW 32CWE-79Published · Updated

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

HumHub Community Edition from 0 before 1.18.7 and from 1.19.0 before 1.19.1 contains a stored cross-site scripting flaw (CWE-79) in the friendship confirmation dialog. An authenticated low-privileged member can save HTML in their first and last name, which runs in the browser of another authenticated user who clicks Friends on that profile.

Written with Claude Haiku 5.5 from the sources below · 2026-11-03

Description from the CNA

HumHub Community Edition 1.19.0 contains a stored cross-site scripting vulnerability in the friendship confirmation dialog. An authenticated low-privileged member can save HTML in their first and last name. When another authenticated user clicks Friends for that profile, HumHub places the decoded display name into a modal through jQuery html(), causing attacker-controlled markup to execute in the victim's HumHub origin.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00401 34th percentileScored 2026-11-07
Fix Fixed HumHub Community Edition (HumHub): 1.18.7, 1.19.1

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
humhubHumHub Community Editionbefore 1.18.7; 1.19.0 to before 1.19.11.18.7, 1.19.1Patch availableCNA
  • HumHub Community Edition Vendorhumhub Affected before 1.18.7; 1.19.0 to before 1.19.1 Fixed in 1.18.7, 1.19.1 Patch available CNA

Remediation

Upgrade HumHub Community Edition to 1.18.7 or to 1.19.1.

Written with Claude Haiku 5.5 from the sources below · 2026-11-03

  • Fix · CNA HumHub Community Edition (HumHub) Fixed in 1.18.7, 1.19.1

Timeline

  1. 2026-11-03 Threatist record created from CVE-2026-115541
  2. 2026-11-05 Priority changed: MEDIUM → LOW
  3. 2026-11-06 CISA SSVC decision points changed

References

Patch 2

Advisory 2

Other 3

  • TI-2026-15145 HumHub 1.18.4 - Stored XSS in comment-deletion notifications through unescaped administrator reason CVSS 4.0HIGH 7.2
  • TI-2022-08676 Improper access control in humhub CVSS 3.1MEDIUM 6.5
  • TI-2017-14097 HumHub Reflected cross site scriting CVSS 3.1MEDIUM 6.1
  • TI-2025-34545 Files: Potential for SQL Injection through File Browse and List Operations CVSS 4.0CRITICAL 9.2
  • TI-2017-14099 HumHub privileges management CVSS 3.1CRITICAL 9.8
  • TI-2024-34921 User enumeration in HubHub CVSS 4.0MEDIUM 6.9
See all 24 →

Sources

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