CVE-2026-73431— Reusable Account Activation and Recovery Tokens Allow Repeated Account Takeover in vulnerability-lookup

Reusable Account Activation and Recovery Tokens Allow Repeated Account Takeover in vulnerability-lookup

Vulnerability-Lookup contains an authentication weakness in its account activation and password-recovery mechanism. Activation and recovery links were generated using stateless signed tokens containing only the user's login. Although the token signature and age were validated, the application did not track whether a token had already been successfully used. As a result, a captured activation or password-recovery link remained valid for the entire configured TOKEN_VALIDITY_PERIOD, even after the associated password had been changed. An attacker who obtains a valid activation or recovery token could therefore replay it multiple times during its validity period to set a new password and repeatedly take control of the affected account. In addition, tokens were not bound to a specific purpose, allowing the same token mechanism to be used across activation and recovery workflows. The patch introduces purpose-bound tokens and a random nonce whose SHA-256 digest is stored with the user account. The nonce is invalidated after a successful password change, making tokens single-use, while issuing a new token invalidates any previously issued token. The password-setting operation now explicitly consumes the token before committing the account change. Successful exploitation requires the attacker to obtain a currently valid activation or recovery link, but does not require knowledge of the victim's existing password or an authenticated session.

CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N

使用捕获-重放进行的认证绕过

Vulnerability-Lookup 授权问题漏洞

Vulnerability-Lookup是Vulnerability-Lookup团队开源的一个漏洞查询与扫描工具。 Vulnerability-Lookup 5.5.1及之前版本存在授权问题漏洞，该漏洞源于账户激活和密码恢复机制中的令牌未跟踪使用状态且未绑定特定目的，可能导致攻击者重放有效激活或恢复令牌以设置新密码并反复控制受影响账户。

N/A

N/A