SQL-Ledger 2.4.4 through 2.6.17 authenticates users by verifying that the value of the sql-ledger-[username] cookie matches the value of the sessionid parameter, which allows remote attackers to gain access as any logged-in user by setting the cookie and the parameter to the same value.

Microsoft Windows 2000 SP4 does not properly validate an RPC server during mutual authentication over SSL, which allows remote attackers to spoof an RPC server, aka the "RPC Mutual Authentication Vulnerability."

RealVNC 4.1.1, and other products that use RealVNC such as AdderLink IP and Cisco CallManager, allows remote attackers to bypass authentication via a request in which the client specifies an insecure security type such as "Type 1 - None", which is accepted even if it is not offered by the server, as originally demonstrated using a long password.

security flaw

RIPd in Quagga 0.98 and 0.99 before 20060503 does not properly enforce RIPv2 authentication requirements, which allows remote attackers to modify routing state via RIPv1 RESPONSE packets.

Session fixation vulnerability in Drupal 4.5.x before 4.5.8 and 4.6.x before 4.5.8 allows remote attackers to gain privileges by tricking a user to click on a URL that fixes the session identifier.

The make_password function in ipsclass.php in Invision Power Board (IPB) 2.1.4 uses random data generated from partially predictable seeds to create the authentication code that is sent by e-mail to a user with a lost password, which might make it easier for remote attackers to guess the code and change the password for an IPB account, possibly involving millions of requests.

SAPID CMS before 1.2.3.03 allows remote attackers to bypass authentication via direct requests to the usr/system files (1) insert_file.php, (2) insert_image.php, (3) insert_link.php, (4) insert_qcfile.php, and (5) edit.php.

Session fixation vulnerability in Jetbox CMS 2.1 SR1 allows remote attackers to hijack web sessions via a crafted link and the administrator section.

relocate_server.php in Coppermine Photo Gallery (CPG) 1.4.2 and 1.4 beta is not removed after installation and does not use authentication, which allows remote attackers to obtain sensitive information, such as database configuration, via a direct request.

mtnpeak.net File Upload Manager does not properly check user authentication for certain actions, which allows remote attackers to provide a modified base64-encoded file parameter and (1) read arbitrary files via the "view" action or (2) delete arbitrary files via the del action.

An authorization issue was addressed with improved state management. This issue is fixed in iOS 18.7.5 and iPadOS 18.7.5, iOS 26.3 and iPadOS 26.3. An attacker with physical access to a locked device may be able to view sensitive user information.

Rack::Session::Cookie secrets: decrypt failure fallback enables secretless session forgery and Marshal deserialization

Rack::Session is a session management implementation for Rack. From 2.0.0 to before 2.1.2, Rack::Session::Cookie incorrectly handles decryption failures when configured with secrets:. If cookie decryption fails, the implementation falls back to a default decoder instead of rejecting the cookie. This allows an unauthenticated attacker to supply a crafted session cookie that is accepted as valid session data without knowledge of any configured secret. Because this mechanism is used to load session state, an attacker can manipulate session contents and potentially gain unauthorized access. This vulnerability is fixed in 2.1.2.

MetForm – Contact Form, Survey, Quiz, & Custom Form Builder for Elementor <= 4.1.0 - Unauthenticated Form Submission Exposure via Forgeable Cookie Value

The MetForm – Contact Form, Survey, Quiz, & Custom Form Builder for Elementor plugin for WordPress is vulnerable to Sensitive Information Exposure in versions up to, and including, 4.1.0. This is due to the use of a forgeable cookie value derived only from the entry ID and current user ID without a server-side secret. This makes it possible for unauthenticated attackers to access form submission entry data via MetForm shortcodes for entries created within the transient TTL (default is 15 minutes).

OAuthenticator: Authentication Bypass in Auth0OAuthenticator via Unverified Email Claims

OAuthenticator is software that allows OAuth2 identity providers to be plugged in and used with JupyterHub. Prior to version 17.4.0, an authentication bypass vulnerability in oauthenticator allows an attacker with an unverified email address on an Auth0 tenant to login to JupyterHub. When email is used as the usrname_claim, this gives users control over their username and the possibility of account takeover. This issue has been patched in version 17.4.0.

Japanized for WooCommerce <= 2.8.4 - Missing Authorization to Unauthenticated Paidy Order Manipulation

The Japanized for WooCommerce plugin for WordPress is vulnerable to Improper Authentication in versions up to, and including, 2.8.4. This is due to a flawed permission check in the `paidy_webhook_permission_check` function that unconditionally returns `true` when the webhook signature header is omitted. This makes it possible for unauthenticated attackers to bypass payment verification and fraudulently mark orders as "Processing" or "Completed" without actual payment via a crafted POST request to the Paidy webhook endpoint.

Windows Storage Elevation of Privilege Vulnerability

Improper authentication in Windows Storage allows an authorized attacker to elevate privileges locally.

Windows Admin Center Elevation of Privilege Vulnerability

Improper authentication in Windows Admin Center allows an authorized attacker to elevate privileges over a network.

PolarLearn: Any password authenticates banned accounts and grants API access

PolarLearn is a free and open-source learning program. In 0-PRERELEASE-15 and earlier, POST /api/v1/auth/sign-in creates a valid session for banned accounts before verifying the supplied password. That session is then accepted across authenticated /api routes, enabling account data access and authenticated actions as the banned user.

PeproDev Ultimate Invoice <= 2.2.5 - Unauthenticated Invoice Archive Download

The PeproDev Ultimate Invoice WordPress plugin through 2.2.5 has a bulk download invoices action that generates ZIP archives containing exported invoice PDFs. The ZIP files are named predictably making it possible to brute force and retreive PII.

Order Notification for WooCommerce < 3.6.3 - Unauthenticated WooCommerce REST Permission Bypass

The Order Notification for WooCommerce WordPress plugin before 3.6.3 overrides WooCommerce's permission checks to grant full access to all unauthenticated requests, enabling complete read/write access to store resources like products, coupons, and customers.