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CVE-2026-34460— NamelessMC: OAuth callback `state` is not validated, allowing login CSRF / session swapping

Quick assessment

Affected
NamelessMC Nameless
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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及之前版本存在安全漏洞，该漏洞源于OAuth回调处理未验证state参数，可能导致攻击者捕获有效回调URL并导致受害者会话被认证为攻击者关联账户。

CVSS 5.4 · Medium EPSS 0.13% · P2

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
NamelessMC Nameless < 2.2.5 affected
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I. Basic Information for CVE-2026-34460

Vulnerability Information
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Vulnerability Title
NamelessMC: OAuth callback `state` is not validated, allowing login CSRF / session swapping
Source: CVE Program / CVE List V5
Vulnerability Description
NamelessMC is website software for Minecraft servers. In versions 2.2.4 and prior, the OAuth callback handling does not validate the state parameter server-side before exchanging the authorization code. This allows an attacker to capture a valid OAuth callback URL for their own account and cause a victim's browser to navigate to it, resulting in the victim's session being authenticated as the attacker-linked account (OAuth login CSRF / session swapping). This is patched in version 2.2.5.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
使用假设不可变数据进行的认证绕过
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及之前版本存在安全漏洞，该漏洞源于OAuth回调处理未验证state参数，可能导致攻击者捕获有效回调URL并导致受害者会话被认证为攻击者关联账户。
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

Vendor Product Affected Versions CPE Subscribe
NamelessMC Nameless < 2.2.5 -

II. Public POCs for CVE-2026-34460

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III. Intelligence Information for CVE-2026-34460

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Vendor Advisories for CVE-2026-34460 (1)

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

CVE-2026-32250 4.3 MEDIUM NamelessMC has Reflected Cross-Site Scripting (XSS) in id parameter of /index.php?route=/q
CVE-2026-33398 Authenticated users can read hidden forum posts through `/forum/get_quotes`
CVE-2026-35443 NamelessMC: Forum reactions bypass the "view own topics only" restriction
CVE-2026-35447 NamelessMC: Private or blocking profile pages can be bypassed with direct POST requests, a
CVE-2026-40314 NamelessMC: Reactions on private or blocking profile posts can be read and modified withou
CVE-2026-40571 NamelessMC: Reactions on private or blocking profile posts can be modified without proper

IV. Related Vulnerabilities

Same product: Nameless
Same vendor: NamelessMC
Same weakness: CWE-302

V. Comments for CVE-2026-34460

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