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CVE-2026-40571— NamelessMC: Reactions on private or blocking profile posts can be modified without proper authorization

AI Predicted 5.3 Difficulty: Easy EPSS 0.24% · P15

Possible ATT&CK Techniques 1AI

T1078 · Valid Accounts

Affected Version Matrix 1

VendorProductVersion RangeStatus
NamelessMCNameless= 2.2.4affected
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I. Basic Information for CVE-2026-40571

Vulnerability Information
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Vulnerability Title
NamelessMC: Reactions on private or blocking profile posts can be modified without proper authorization
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
NamelessMC 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
NamelessMC是NamelessMC团队的一款免费、易于使用且功能强大的网站软件。适用于您的 Minecraft 服务器，其中包含大量功能。 NamelessMC 2.2.4版本存在安全漏洞，该漏洞源于ProfilePostReactionContext.php仅验证墙贴存在而未强制执行屏蔽或私密配置文件可见性，可能导致经过身份验证的低权限用户向私密或屏蔽配置文件添加反应。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
NamelessMCNameless = 2.2.4 -

II. Public POCs for CVE-2026-40571

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III. Intelligence Information for CVE-2026-40571

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Vendor Advisories for CVE-2026-40571 (1)

Same Patch Batch · NamelessMC · 2026-06-02 · 7 CVEs total

CVE-2026-344605.4 MEDIUMNamelessMC: OAuth callback `state` is not validated, allowing login CSRF / session swappin
CVE-2026-322504.3 MEDIUMNamelessMC has Reflected Cross-Site Scripting (XSS) in id parameter of /index.php?route=/q
CVE-2026-33398Authenticated users can read hidden forum posts through `/forum/get_quotes`
CVE-2026-35443NamelessMC: Forum reactions bypass the "view own topics only" restriction
CVE-2026-35447NamelessMC: Private or blocking profile pages can be bypassed with direct POST requests, a
CVE-2026-40314NamelessMC: Reactions on private or blocking profile posts can be read and modified withou

IV. Related Vulnerabilities

Same product: Nameless
Same vendor: NamelessMC
Same weakness: CWE-862

V. Comments for CVE-2026-40571

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