TI-2026-30175 Aliases CVE-2026-41657 GHSA-g8p8-94f2-28gr

Admidio: Cross-Organization Member Data Exposure via Permission Check Mismatch in contacts_data.php

LOW 22CWE-863Published 2026-05-07 · Updated 2026-05-07

Key facts

Attack vector: Network
Privileges required: High
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 and GitHub. Impact type from CWE-863.

Summary

Admidio is an open-source user management solution. Prior to version 5.0.9, the contacts_data.php endpoint uses a weaker permission check (isAdministratorUsers(), requiring only rol_edit_user=true) than the frontend UI (contacts.php) which correctly requires the stronger isAdministrator() (requiring rol_administrator=true) and the contacts_show_all system setting. A user manager who is not a full administrator can directly request contacts_data.php?mem_show_filter=3 to retrieve all user records across all organizations in the Admidio instance, bypassing multi-tenant organization isolation. This issue has been patched in version 5.0.9.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00322 25th percentileScored 2026-11-07

Fix Fixed admidio (Admidio): 5.0.9admidio/admidio (Packagist): 5.0.9

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

Vendor	Product	Affected versions	Fixed in	Status	Source
Admidio	admidio	before 5.0.9	5.0.9	Patch available	CNA
—	admidio/admidio (Packagist)	before 5.0.9	5.0.9	Patch available	GHSA-g8p8-94f2-28gr

admidio VendorAdmidio Affected before 5.0.9 Fixed in 5.0.9 Patch available CNA
admidio/admidio (Packagist) Vendor— Affected before 5.0.9 Fixed in 5.0.9 Patch available GHSA-g8p8-94f2-28gr

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPE	Versions	Role	Vendor
cpe:2.3:a:admidio:admidio::::::::	—	—	Admidio

cpe:2.3:a:admidio:admidio:*:*:*:*:*:*:*:* Versions — — ·Admidio

Remediation

Fix · CNA admidio (Admidio) Fixed in 5.0.9
Fix · GHSA-g8p8-94f2-28gr admidio/admidio (Packagist) Fixed in 5.0.9 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2026-41657
2026-10-03 Alias added: GHSA-g8p8-94f2-28gr

References

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2026-41657

Other 3

TI-2026-25286 Admidio is Missing Authorization and CSRF Protection on Document and Folder Deletion CVSS 3.1CRITICAL 9.1
TI-2026-56995 Admidio before 5.0.12 Authentication Bypass via RSS feeds CVSS 4.0HIGH 8.7
TI-2026-56993 Admidio before 5.0.12 SQL Injection via relation_type_list CVSS 4.0HIGH 8.7
TI-2024-25222 Admidio has Blind SQL Injection in ecard_send.php CVSS 3.1CRITICAL 10.0
TI-2026-30186 Admidio: SAML Signature Validation Result Ignored — Forged AuthnRequests and LogoutRequests Processed CVSS 3.1HIGH 8.2
TI-2024-25764 Admidio Vulnerable to RCE via Arbitrary File Upload in Message Attachment CVSS 3.1CRITICAL 9.1

See all 72 →

Sources

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