What’s Vulnerable › Vulnerabilities

CVE-2026-40314: NamelessMC: Reactions on private or blocking profile posts can be read and modified without proper authorization

• Severity: medium (CVSS 6.9 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-02 · updated 2026-07-21
• Weakness: CWE-862

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. `modules/Core/queries/reactions.php` allows unauthenticated GET requests for reaction details. This means that unauthenticated visitors can read reaction participants and timestamps for private profile posts and uthenticated low-privileged users can add reactions to private or blocking profile posts. Version 2.2.5 fixes the issue.

Affected products

• NamelessMC Nameless: = 2.2.4

References

• https://github.com/NamelessMC/Nameless/security/advisories/GHSA-55q9-8qm3-4grc
• https://github.com/NamelessMC/Nameless/security/advisories/GHSA-55q9-8qm3-4grc

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