CVE-2026-12740— c9s Plack::Middleware::OAuth 跨站请求伪造漏洞

Plack::Middleware::OAuth versions through 0.10 for Perl do not support the OAuth 2.0 state parameter

Plack::Middleware::OAuth versions through 0.10 for Perl do not support the OAuth 2.0 state parameter. RequestTokenV2 builds the provider authorization redirect without issuing a state value, and AccessTokenV2 exchanges the callback code and registers the resulting token into the session (register_session) without verifying that the callback corresponds to an authorization request this session initiated. Any application that uses this middleware for OAuth 2.0 login is exposed to login cross-site request forgery: because the callback is not bound to the session that began the flow, an attacker who starts an authorization with their own provider account can deliver the resulting callback to a victim, causing the victim's session to complete the attacker's authorization and associating the attacker's provider identity and access token with that session. Where the application persists this as an account link, the attacker may retain access to the victim's account through their own provider credentials.

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跨站请求伪造(CSRF)

c9s Plack::Middleware::OAuth 跨站请求伪造漏洞

c9s Plack::Middleware::OAuth是c9s个人开发者的一款OAuth认证的Web中间件。 c9s Plack::Middleware::OAuth 0.10及之前版本存在跨站请求伪造漏洞，该漏洞源于不支持OAuth 2.0状态参数，RequestTokenV2构建重定向时未生成state值，AccessTokenV2在交换回调代码时未验证回调与初始授权请求的绑定，可能导致登录跨站请求伪造攻击。

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