CVE-2026-40571 PUBLISHED

NamelessMC: Reactions on private or blocking profile posts can be modified without proper authorization

Assigner: GitHub_M
Reserved: 14.04.2026 Published: 02.06.2026 Updated: 03.06.2026

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.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
CVSS Score: 5.3

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	Low	Confidentiality	None
Attack Complexity	Low	Integrity	Low	Integrity	None
Attack Requirements	None	Availability	None	Availability	None
Privileges Required	Low
User Interaction	None

CVSS 4.0

Product Status

Vendor	NamelessMC
Product	Nameless
Versions	Version = 2.2.4 is affected

References

https://github.com/NamelessMC/Nameless/security/advisories/GHSA-47hr-jj6c-rqf9

Problem Types

CWE-862: Missing Authorization CWE