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TI-2021-19653 Aliases CVE-2021-43847

Authorization Bypass in Space Invite in HumHub

Priority LOW 31CWE-285Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-285.

Summary

HumHub is an open-source social network kit written in PHP. Prior to HumHub version 1.10.3 or 1.9.3, it could be possible for registered users to become unauthorized members of private Spaces. Versions 1.10.3 and 1.9.3 contain a patch for this issue.

Why it matters now

EPSS 0.01223 68th percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by NVD
Fix Fixed humhub (humhub): 1.10.3, 1.9.3

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
humhubhumhub1.10.0 to before 1.10.3; before 1.9.31.10.3, 1.9.3Patch availableCNA
  • humhub Vendorhumhub Affected 1.10.0 to before 1.10.3; before 1.9.3 Fixed in 1.10.3, 1.9.3 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:humhub:humhub:*:*:*:*:*:*:*:*before 1.9.3; 1.10.0 to before 1.10.3Vulnerablehumhub
  • cpe:2.3:a:humhub:humhub:*:*:*:*:*:*:*:* Versions before 1.9.3; 1.10.0 to before 1.10.3 Vulnerable ·humhub

Remediation

  • Fix · CNA humhub (humhub) Fixed in 1.10.3, 1.9.3

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-43847

References

Exploit 2

Patch 1

Advisory 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-2017-14099 HumHub privileges management CVSS 3.1CRITICAL 9.8
  • TI-2024-34921 User enumeration in HubHub CVSS 4.0MEDIUM 6.9
  • TI-2014-07750 SQL injection vulnerability in the actionIndex function in… CVSS 2.0HIGH 7.5
  • TI-2019-08643 A cross-site scripting (XSS) vulnerability in HumHub 1.3.12 allows remote attackers to… CVSS 3.0MEDIUM 6.1
See all 13 →

Sources

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