WPGraphQL 是 WordPress 站点的 GraphQL API 插件。在 2.0.0 至 2.15.1 版本中，SendPasswordResetEmailPayload 上的已废弃 user 字段存在逻辑缺陷，允许未认证的调用者通过 sendPasswordResetEmail 突变来区分已存在的作者级（author-class）账户，并进而获取这些账户的公开个人资料字段。这意味着攻击者无需登录即可枚举有效用户名，例如通过观察响应差异确定特定用户名是否存在，从而为后续的钓鱼攻击、定向暴力破解或社工提供便利。该问题在 2.15.1 版本中已修复。根据现有元数据，此漏洞属于信息泄露类问题，CVSS 与 EPSS 分数未提供，也未标记为已知被利用或列入 KEV。建议所有使用受影响版本的用户尽快升级到 2.15.1 或更高版本，同时可考虑限制 GraphQL 端点的网络暴露范围，以降低被探测的风险。

## Summary The `sendPasswordResetEmail` mutation in WPGraphQL is explicitly designed to prevent user enumeration. The resolver in `src/Mutation/SendPasswordResetEmail.php` states in a code comment: `// We obsfucate the actual success of this mutation to prevent user enumeration.` The mutation always returns `success: true` regardless of whether the supplied username/email belongs to an existing

## Summary The login lockout mechanism in Budibase creates an observable response discrepancy that allows unauthenticated attackers to enumerate valid email addresses. When an existing user's account is locked after 5 failed login attempts, the server returns a distinct `403` response with `X-Account-Locked: 1` and `Retry-After: 900` headers plus the message "Account temporarily locked." For non-

xrdp is an open source RDP server. Versions 0.10.6 and prior contain a timing side-channel vulnerability in the login interface. Due to a discrepancy in response processing times, a remote attacker can infer the existence of a username on the system, leading to unauthorized information disclosure via username enumeration. This issue has been fixed in version 0.10.6.1.

xrdp is an open source RDP server. Versions 0.10.6 and prior contain a timing side-channel vulnerability in the login interface. Due to a discrepancy in response processing times, a remote attacker can infer the existence of a username on the system, leading to unauthorized information disclosure via username enumeration. This issue has been fixed in version 0.10.6.1.

HCL Aftermarket EPC is vulnerable to attack since It was found that a malicious actor can use brute-force techniques to either guess or confirm valid users in the system. Use renumeration is when a malicious actor can use brute-force techniques to either guess or confirm valid users in a system

An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2. There is an ESEARCH cross-user content oracle. By using the ESEARCH command, an authenticated IMAP user could enumerate folder names under any account they could name. Search would return UIDs of messages matching the search, creating a content oracle (without allowing arbitrary reads of the target's content).

An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2. There is an ESEARCH cross-user content oracle. By using the ESEARCH command, an authenticated IMAP user could enumerate folder names under any account they could name. Search would return UIDs of messages matching the search, creating a content oracle (without allowing arbitrary reads of the target's content).

Mojolicious versions from 4.59 before 9.48 for Perl expose a stable representation of the session CSRF token to a BREACH compression oracle. _csrf_token generates and caches one token per session and returns the same value on every call, and _csrf_field places that value in a hidden `csrf_token` input. When a response carrying the token also echoes attacker-controlled input and is gzip-compressed

SAP HANA Database (user self service tools) allows an unauthenticated user to send specially crafted requests that produce distinguishable responses, enabling enumeration of valid user accounts and email addresses. Successful exploitation could allow the attacker to enumerate valid user accounts, resulting in low impact on confidentiality, with no impact on integrity and availability of the applic

CVE-2026-44753 影响 SAP HANA 数据库的用户自助服务工具组件。该漏洞允许未经身份验证的攻击者发送特制请求，由于服务器对不同请求返回可区分的响应，攻击者能够据此枚举有效的用户账户和电子邮件地址。该漏洞源于应用中响应差别的可观察性，属于信息泄露问题。虽然攻击复杂度较高（需要特殊构造请求），但攻击者无需任何凭证即可从远程发起探测。成功利用后，攻击者可以获得系统中有效用户账户的列表，进而可能为后续定向攻击（如钓鱼、密码喷洒）提供目标信息。根据 CVSS 3.1 评分，该漏洞基础分为 3.7（低危），影响范围仅限于机密性的低度损失，不影响完整性和可用性。厂商 SAP 已发布安全公告，建议受影响版本用户尽快应用官方补丁或实施缓解措施。由于该漏洞允许远程未授权枚举用户信息，在企业环境中可能配合其他漏洞提升攻击效果，建议安全团队评估自身部署并限制对该组件的网络访问。

Rejetto HFS 3.0.0 through 3.2.0 returns observably different responses from its login endpoint depending on whether the submitted username exists. A remote unauthenticated attacker can use this to confirm valid account names, including the default admin account, facilitating password-guessing and session-forgery attacks.

Rejetto HFS 3.0.0 through 3.2.0 returns observably different responses from its login endpoint depending on whether the submitted username exists. A remote unauthenticated attacker can use this to confirm valid account names, including the default admin account, facilitating password-guessing and session-forgery attacks.

## Impact `Webauthn\SimpleFakeCredentialGenerator` is the library-provided default implementation of the `FakeCredentialGenerator` interface. It returns a stable list of decoy `PublicKeyCredentialDescriptor` objects for a given username so that an assertion request for an unknown user looks the same as a request for a real one, which mitigates username enumeration. The generator derives the whol

MCO is vulnerable to User Enumeration through authentication-related functionalities. The application returns distinguishable responses for valid and invalid users during username reminder and password reset operations. An attacker can leverage these differences to enumerate valid usernames and email addresses. Because vendor contact attempts were unsuccessful, the vulnerability has only been con

Ghost is a Node.js content management system. From 5.18.0 until 6.21.1, a discrepancy in responses from the members signin endpoints made it possible for an unauthenticated attacker to determine whether a given email address belongs to a registered member of a Ghost site. This vulnerability is fixed in 6.21.1.

vantage6 is an open-source infrastructure for privacy preserving analysis. Versions prior to 5.0.0 provide an initial user with username `root` and password `root`. This is not ideal because attackers know that almost all vantage6 servers have a user with username `root` that probably has admin rights, and the initial password is very weak and it is possible that administrators forget to reset it.

### Impact Vantage6 currently provides an initial user with username `root` and password `root`. This is not ideal for the following reasons: - Attackers know that almost all vantage6 servers have a user with username `root` that probably has admin rights - The initial password is very weak and it is possible that administrators forget to reset it. ### Patches No ### Workarounds It is possible t

FreeScout 是一个基于 PHP 的 Laravel 框架构建的免费帮助台和共享收件箱系统。在版本 1.8.219 之前，其密码重置端点会针对提交的邮箱地址是否属于有效用户账户返回视觉上不同的响应（例如，存在账户时返回“重置链接已发送”，不存在时返回“邮箱未注册”等不同提示），从而允许未经身份验证的攻击者枚举有效的帮助台代理邮箱地址。此漏洞属于敏感信息泄露，攻击者可以利用枚举到的邮箱发起定向钓鱼攻击或进一步暴力破解。该漏洞影响所有低于 1.8.219 的版本。厂商已在 1.8.219 版本中修复此问题，修复方式为统一响应内容，不再区分账户是否存在。建议所有用户立即升级至最新版本。此外，可考虑在网络层面限制对密码重置端点的外部访问，或添加验证码等防护机制以减缓枚举攻击。

WWBN AVideo is an open source video platform. In 29.0 and earlier, objects/mention.json.php has no User::loginCheck() or admin gate. It only has an entry guard: preg_match('/^@/', $_REQUEST['term']) and hard-coded rowCount=10. This enables unauthenticated user enumeration.

Statamic is a Laravel and Git powered content management system (CMS). Prior to 5.73.21 and 6.15.0, responses from the forgot password forms hinted at whether an account existed for a given email address. An unauthenticated attacker could use this to enumerate valid users, which can aid in follow-up credential-based attacks. This vulnerability is fixed in 5.73.21 and 6.15.0.

The check user account lock states feature within the email OTP flow fails to validate user input, allowing an attacker to infer the existence of registered user accounts. The discovery of valid usernames can increase the risk of brute-force and social engineering attacks. Attackers can leverage this information to craft targeted phishing campaigns or other malicious activities aimed at tricking

A vulnerability was found in Industrial Application Software IAS Canias ERP 8.03. The impacted element is the function doAction of the component Login RMI Interface. Performing a manipulation results in observable response discrepancy. The attack is possible to be carried out remotely. A high degree of complexity is needed for the attack. The exploitability is regarded as difficult. The exploit ha

## Summary The unauthenticated resend-verification endpoint returns different responses for registered and unregistered email addresses. A malicious third party can submit candidate addresses to `/api/v4/account/auth/resend_verification_email` and distinguish accounts from misses. ## Details `resend_verification_email()` looks up the submitted address and returns the lookup error to the caller: