Weakness (CWE)
CWE-757: Algorithm Downgrade
A protocol or its implementation supports interaction between multiple actors and allows those actors to negotiate which algorithm should be used in a protection mechanism such as encryption or authentication, but it does not select the strongest algorithm that is available to both parties.
Source: MITRE CWE-757
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High 8.8
AsyncHttpClient: Digest mutual authentication is switched off by a peer offering qop=auth-int
The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and asynchronously process HTTP responses. In 3.0.12, a peer offering only Digest qop=auth-int causes mutual-authentication verification to be skipped. AuthenticatorUti…
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High 8.7
AsyncHttpClient: Digest challenge without a usable nonce downgrades to Basic and sends the password in cleartext
The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and asynchronously process HTTP responses. Prior to 3.0.13 and 2.16.1, Realm.Builder treats a Digest challenge that yields no usable nonce as a Basic challenge. A malic…
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High 8.8
Howyar｜WeenyGenius - Use of Insecure Protocol
WeenyGenius, a computer lab management system by Howyar Technologies, has a Use of Insecure Protocol vulnerability. Due to the reliance on ZMTP Null mode, unauthenticated attackers on the same network can capture packets to leak transmitted data, or perform r…
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High 8.8
Improper Authentication in MongoDB Intra-Cluster Connections Allows Credential Exposure
An issue in MongoDB Server's intra-cluster connection setup could allow a party with suitable network access to influence which authentication mechanism is used when one replica set member connects to another. Under certain conditions, this could cause the cl…
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High 8.7
better-auth before 1.6.11 Insecure Cryptographic Defaults via oidcProvider
better-auth versions before 1.6.11 contain insecure cryptographic defaults in the oidcProvider and mcp plugins that advertise the none algorithm and accept plain PKCE by default. Attackers can exploit algorithm negotiation to accept unsigned tokens or interce…
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High 8.2
SCRAM: Silent channel-binding authentication downgrade via unsupported certificate algorithms
SCRAM (Salted Challenge Response Authentication Mechanism) is part of the family of Simple Authentication and Security Layer (SASL, RFC 4422) authentication mechanisms. Prior to 3.3, a flaw in com.ongres.scram:scram-client and com.ongres.scram:scram-common al…
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High 8.2
Silent channel-binding authentication downgrade via unsupported certificate algorithms
pgjdbc is an open source postgresql JDBC Driver. In releases 42.7.4 through 42.7.11, channelBinding=require connections can be silently downgraded from SCRAM-SHA-256-PLUS with channel binding to plain SCRAM-SHA-256 without it, losing the man-in-the-middle pro…
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High 7.5
Anviz CrossChex Standard Algorithm Downgrade
Anviz CrossChex Standard is vulnerable when an attacker manipulates the TDS7 PreLogin to disable encryption, causing database credentials to be sent in plaintext and enabling unauthorized database access.
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High 7.6
Silicon Labs Z-Wave PIR Sensor Joins Network as Non-Secure
When SmartStart Inclusion fails during the onboarding of a Z-Wave PIR sensor, the sensor will join the network as a non-secure device. This vulnerability exists in Silicon Labs' Z-Wave PIR Sensor Reference design delivered as part of SiSDK v2025.6.0 and v2025…
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High 8.3
Protocol Downgrade in SIMPLE.ERP
SIMPLE.ERP client is vulnerable to MS SQL protocol downgrade request from a server side, what could lead to an unencrypted communication vulnerable to data interception and modification. This issue affect SIMPLE.ERP from 6.20 to 6.30. Only the 6.30 version re…
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High 7.5
Dex 2.37.0 is discarding TLSconfig and always serves deprecated TLS 1.0/1.1 and insecure ciphers
Dex is an identity service that uses OpenID Connect to drive authentication for other apps. Dex 2.37.0 serves HTTPS with insecure TLS 1.0 and TLS 1.1. `cmd/dex/serve.go` line 425 seemingly sets TLS 1.2 as minimum version, but the whole `tlsConfig` is ignored …
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High 7.3
Weak Default SSL use in Port Forwarding Service
The Western Digital My Cloud Web App [https://os5.mycloud.com/] uses a weak SSLContext when attempting to configure port forwarding rules. This was enabled to maintain compatibility with old or outdated home routers. By using an "SSL" context instead of "TLS"…
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High 7.4
A flaw was found when an OpenSSL security provider is used with Wildfly, the 'enabled-protocols' value in the Wildfly c…
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High 7.7
lack of keypinning in libzypp could lead to repository switching
In libzypp before August 2018 GPG keys attached to YUM repositories were not correctly pinned, allowing malicious repository mirrors to silently downgrade to unsigned repositories with potential malicious content.