CVE-2026-34460— NamelessMC: OAuth callback `state` is not validated, allowing login CSRF / session swapping
Possible ATT&CK Techniques 1AI
T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| 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: NVD (National Vulnerability Database)
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: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
使用假设不可变数据进行的认证绕过
Source: NVD (National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| NamelessMC | Nameless | < 2.2.5 | - |
II. Public POCs for CVE-2026-34460
| # | POC Description | Source Link | Shenlong Link |
|---|
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No public POC found.
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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
- CVE-2026-40571
NamelessMC: Reactions on private or blocking profile posts c - CVE-2026-35447
NamelessMC: Private or blocking profile pages can be bypasse - CVE-2026-40314
NamelessMC: Reactions on private or blocking profile posts c - CVE-2026-35443
NamelessMC: Forum reactions bypass the "view own topics only - CVE-2026-33398
Authenticated users can read hidden forum posts through `/fo
Same vendor: NamelessMC
- CVE-2026-40571
NamelessMC: Reactions on private or blocking profile posts c - CVE-2026-35447
NamelessMC: Private or blocking profile pages can be bypasse - CVE-2026-40314
NamelessMC: Reactions on private or blocking profile posts c - CVE-2026-35443
NamelessMC: Forum reactions bypass the "view own topics only - CVE-2026-33398
Authenticated users can read hidden forum posts through `/fo
V. Comments for CVE-2026-34460
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