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CVE-2026-92161— FriendsOfFlarum OAuth: Unauthenticated account takeover via unverified email trust in Discord OAuth provider

Quick assessment

Affected
FriendsOfFlarum oauth
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.

FriendsOfFlarum OAuth 插件允许用户使用 GitHub、Twitter、Facebook 等第三方提供商登录 Flarum。在版本 1.7.4 和 2.0.0-beta.4 之前，Discord OAuth 提供商在调用 将邮箱地址作为可信邮箱传递给 Flarum 核心之前，未检查 Discord 返回的“邮箱是否已验证”（verified）字段。因此，当启用 Discord 登录功能时，攻击者只要知道某位 Flarum 用户的邮箱地址，便可创建一个 Discord 账户，使用该未经验证的邮箱地

CVSS 9.8 · Critical EPSS 0.27% · P18
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I. Basic Information for CVE-2026-92161

Vulnerability Information
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Vulnerability Title
FriendsOfFlarum OAuth: Unauthenticated account takeover via unverified email trust in Discord OAuth provider
Source: CVE Program / CVE List V5
Vulnerability Description
FriendsOfFlarum OAuth allows users to log in to Flarum with GitHub, Twitter, Facebook, and other providers. Prior to 1.7.4 and 2.0.0-beta.4, the Discord OAuth provider does not check the verified field returned for an OAuth email before passing the address to Flarum core as trusted through provideTrustedEmail(). When Discord sign-in is enabled, an unauthenticated attacker who knows the email address of a Flarum user can configure a Discord account with that unverified address and a verified phone number, then sign in to cause Flarum to match the trusted address, link the attacker-controlled Discord identity to the existing user, and authenticate as the victim without a password or victim interaction. Exploitation requires that the victim's email address is not already associated with a Discord account, and it can compromise administrator accounts. Other bundled providers were not confirmed to be practically exploitable by this method because their relevant authentication flows return only verified or confirmed email addresses. This issue is fixed in versions 1.7.4 and 2.0.0-beta.4.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对数据真实性的验证不充分
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
FriendsOfFlarum oauth < 1.7.4 -

II. Public POCs for CVE-2026-92161

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III. Intelligence Information for CVE-2026-92161

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Other References for CVE-2026-92161 (5)

IV. Related Vulnerabilities

Same product: oauth
Same vendor: FriendsOfFlarum
Same weakness: CWE-345

V. Comments for CVE-2026-92161

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