The OpenSSH server, as used in Fedora and Red Hat Enterprise Linux 7 and when running in a Kerberos environment, allows remote authenticated users to log in as another user when they are listed in the .k5users file of that user, which might bypass intended authentication requirements that would force a local login.

Improper Authentication in Nextcloud Server prior to version 12.0.3 would allow an attacker that obtained user credentials to bypass the 2 Factor Authentication.

IBM Datacap Fastdoc Capture 9.1.1, 9.1.3, and 9.1.4 could allow an authenticated user to bypass future authentication mechanisms once the initial login is completed. IBM X-Force ID: 148691.

A firmware update vulnerability exists in the iburn firmware checks functionality of InHand Networks InRouter302 V3.5.37. A specially-crafted HTTP request can lead to firmware update. An attacker can send a sequence of requests to trigger this vulnerability.

An issue was discovered in phpMyAdmin 4.9 before 4.9.8 and 5.1 before 5.1.2. A valid user who is already authenticated to phpMyAdmin can manipulate their account to bypass two-factor authentication for future login instances.

Wiki.js is a wiki app built on Node.js. In affected versions an authenticated user with write access on a restricted set of paths can update a page outside the allowed paths by specifying a different target page ID while keeping the path intact. The access control incorrectly check the path access against the user-provided values instead of the actual path associated to the page ID. Commit https://github.com/Requarks/wiki/commit/411802ec2f654bb5ed1126c307575b81e2361c6b fixes this vulnerability by checking access control on the path associated with the page ID instead of the user-provided value. When the path is different than the current value, a second access control check is then performed on the user-provided path before the move operation.

When a password reset mechanism is configured to use the Authentication API with an Authentication Policy, email One-Time Password, PingID or SMS authentication, an existing user can reset another existing user’s password.

Trendnet AC2600 TEW-827DRU version 2.08B01 contains an improper access control configuration that could allow for a malicious firmware update. It is possible to manually install firmware that may be malicious in nature as there does not appear to be any signature validation done to determine if it is from a known and trusted source. This includes firmware updates that are done via the automated "check for updates" in the admin interface. If an attacker is able to masquerade as the update server, the device will not verify that the firmware updates downloaded are legitimate.

An authentication bypass flaw was found in the way krb5's certauth interface before 1.16.1 handled the validation of client certificates. A remote attacker able to communicate with the KDC could potentially use this flaw to impersonate arbitrary principals under rare and erroneous circumstances.

On Metasys ADX Server version 12.0 running MVE, an Active Directory user could execute validated actions without providing a valid password when using MVE SMP UI.

OnionShare is an open source tool that lets you securely and anonymously share files, host websites, and chat with friends using the Tor network. In affected versions anyone with access to the chat environment can write messages disguised as another chat participant.

IBM UrbanCode Deploy (UCD) 7.1 - 7.1.2.12, 7.2 through 7.2.3.5, and 7.3 through 7.3.2.0 under certain configurations could allow an authenticated user to make changes to environment variables due to improper authentication controls. IBM X-Force ID: 263581.

In Jenkins before versions 2.44, 2.32.2 low privilege users were able to act on administrative monitors due to them not being consistently protected by permission checks (SECURITY-371).

The web services implementation in Moodle 2.0.x before 2.0.6 and 2.1.x before 2.1.3 does not properly consider the maintenance-mode state and account attributes during login attempts, which allows remote authenticated users to bypass intended access restrictions by connecting to a webservice server.

The WPQA Builder Plugin WordPress plugin before 5.2, used as a companion plugin for the Discy and Himer , does not validate that the value passed to the image_id parameter of the ajax action wpqa_remove_image belongs to the requesting user, allowing any users (with privileges as low as Subscriber) to delete the profile pictures of any other user.

Insufficient capability checks could allow users with the moodle/site:uploadusers capability to delete users, without having the necessary moodle/user:delete capability.

A downgrade from two-factor authentication to one-factor authentication vulnerability in the CGI program of Zyxel USG/ZyWALL series firmware versions 4.32 through 4.71, USG FLEX series firmware versions 4.50 through 5.21, ATP series firmware versions 4.32 through 5.21, and VPN series firmware versions 4.32 through 5.21, that could allow an authenticated attacker to bypass the second authentication phase to connect the IPsec VPN server even though the two-factor authentication (2FA) was enabled.

Insecure authentication and session management vulnerability exists in Magento 2.2 prior to 2.2.10, Magento 2.3 prior to 2.3.3 or 2.3.2-p1. An authenticated user can manipulate session validation setting for a storefront that leads to insecure authentication and session management.

In SilverStripe through 4.6.0-rc1, GraphQL doesn't honour MFA (multi-factor authentication) when using basic authentication.

Dell EMC iDRAC9 versions prior to 4.40.00.00 contain an improper authentication vulnerability. A remote authenticated malicious user with high privileges could potentially exploit this vulnerability to manipulate the username field under the comment section and set the value to any user.

A vulnerability in the Image Signature Verification feature of Cisco Firepower Threat Defense (FTD) Software could allow an authenticated, remote attacker with administrator-level credentials to install a malicious software patch on an affected device. The vulnerability is due to improper verification of digital signatures for patch images. An attacker could exploit this vulnerability by crafting an unsigned software patch to bypass signature checks and loading it on an affected device. A successful exploit could allow the attacker to boot a malicious software patch image.