CVE-2026-39355: CWE-862: Missing Authorization in MGeurts genealogy
A critical broken access control vulnerability (CWE-862) exists in MGeurts genealogy versions prior to 5. 9. 1. This flaw allows any authenticated user to transfer ownership of arbitrary non-personal teams to themselves, resulting in complete takeover of other users' team workspaces and full access to all associated genealogy data. The vulnerability is fixed in version 5. 9. 1. No known exploits are reported in the wild as of the publication date.
AI Analysis
Technical Summary
CVE-2026-39355 is a critical missing authorization vulnerability in the MGeurts genealogy PHP application before version 5.9.1. It allows authenticated users to bypass access controls and transfer ownership of non-personal teams arbitrarily. This leads to full compromise of team workspaces and unrestricted access to all genealogy data linked to those teams. The vulnerability is addressed in version 5.9.1. The CVSS v3.1 base score is 10.0, reflecting network attack vector, low attack complexity, required privileges of an authenticated user, no user interaction, scope change, and high impact on confidentiality, integrity, and availability.
Potential Impact
Successful exploitation results in complete takeover of other users' team workspaces within the genealogy application, granting the attacker unrestricted access to all genealogy data associated with those teams. This compromises confidentiality, integrity, and availability of sensitive genealogical information.
Mitigation Recommendations
Upgrade the MGeurts genealogy application to version 5.9.1 or later, where this vulnerability is fixed. Since no official patch link or advisory is provided, verify the upgrade from the vendor's official sources. Until upgraded, restrict authenticated user privileges as much as possible to limit exposure.
CVE-2026-39355: CWE-862: Missing Authorization in MGeurts genealogy
Description
A critical broken access control vulnerability (CWE-862) exists in MGeurts genealogy versions prior to 5. 9. 1. This flaw allows any authenticated user to transfer ownership of arbitrary non-personal teams to themselves, resulting in complete takeover of other users' team workspaces and full access to all associated genealogy data. The vulnerability is fixed in version 5. 9. 1. No known exploits are reported in the wild as of the publication date.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-39355 is a critical missing authorization vulnerability in the MGeurts genealogy PHP application before version 5.9.1. It allows authenticated users to bypass access controls and transfer ownership of non-personal teams arbitrarily. This leads to full compromise of team workspaces and unrestricted access to all genealogy data linked to those teams. The vulnerability is addressed in version 5.9.1. The CVSS v3.1 base score is 10.0, reflecting network attack vector, low attack complexity, required privileges of an authenticated user, no user interaction, scope change, and high impact on confidentiality, integrity, and availability.
Potential Impact
Successful exploitation results in complete takeover of other users' team workspaces within the genealogy application, granting the attacker unrestricted access to all genealogy data associated with those teams. This compromises confidentiality, integrity, and availability of sensitive genealogical information.
Mitigation Recommendations
Upgrade the MGeurts genealogy application to version 5.9.1 or later, where this vulnerability is fixed. Since no official patch link or advisory is provided, verify the upgrade from the vendor's official sources. Until upgraded, restrict authenticated user privileges as much as possible to limit exposure.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-04-06T21:29:17.349Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69d5874b43e2781bad84eb12
Added to database: 4/7/2026, 10:38:03 PM
Last enriched: 4/15/2026, 12:39:23 PM
Last updated: 5/22/2026, 10:33:37 PM
Views: 63
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