CVE-2026-40571: CWE-862: Missing Authorization in NamelessMC Nameless
NamelessMC is website software for Minecraft servers. In version 2.2.4, `core/classes/Misc/ProfilePostReactionContext.php` only verifies that the wall post exists and does not enforce blocked/private-profile visibility. This means that authenticated low-privileged users can add reactions to private or blocking profile posts. Version 2.2.5 contains a patch.
AI Analysis
Technical Summary
CVE-2026-40571 is a missing authorization vulnerability (CWE-862) in NamelessMC version 2.2.4. The affected file, core/classes/Misc/ProfilePostReactionContext.php, fails to enforce blocked or private profile visibility when adding reactions to wall posts. As a result, authenticated users with low privileges can react to posts they should not have access to. This issue is fixed in NamelessMC version 2.2.5.
Potential Impact
Authenticated low-privileged users can add reactions to profile posts that are private or belong to users who have blocked them, violating intended privacy controls. There is no indication of further privilege escalation or data disclosure beyond this unauthorized reaction capability.
Mitigation Recommendations
Upgrade NamelessMC to version 2.2.5 or later, where this authorization check has been properly enforced. Patch status is confirmed by the vendor's versioning; no other remediation details are provided. Until upgraded, be aware that private and blocked profile posts may be subject to unauthorized reactions.
CVE-2026-40571: CWE-862: Missing Authorization in NamelessMC Nameless
Description
NamelessMC is website software for Minecraft servers. In version 2.2.4, `core/classes/Misc/ProfilePostReactionContext.php` only verifies that the wall post exists and does not enforce blocked/private-profile visibility. This means that authenticated low-privileged users can add reactions to private or blocking profile posts. Version 2.2.5 contains a patch.
CVSS v4.0
Score 5.3medium
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-40571 is a missing authorization vulnerability (CWE-862) in NamelessMC version 2.2.4. The affected file, core/classes/Misc/ProfilePostReactionContext.php, fails to enforce blocked or private profile visibility when adding reactions to wall posts. As a result, authenticated users with low privileges can react to posts they should not have access to. This issue is fixed in NamelessMC version 2.2.5.
Potential Impact
Authenticated low-privileged users can add reactions to profile posts that are private or belong to users who have blocked them, violating intended privacy controls. There is no indication of further privilege escalation or data disclosure beyond this unauthorized reaction capability.
Mitigation Recommendations
Upgrade NamelessMC to version 2.2.5 or later, where this authorization check has been properly enforced. Patch status is confirmed by the vendor's versioning; no other remediation details are provided. Until upgraded, be aware that private and blocked profile posts may be subject to unauthorized reactions.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-04-14T13:24:29.474Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a1f1079e29bf47b50e963a6
Added to database: 6/2/2026, 5:18:49 PM
Last enriched: 6/2/2026, 5:34:55 PM
Last updated: 6/3/2026, 4:57:44 AM
Views: 13
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