CVE-2020-15234

ORY Fosite is a security first OAuth2 & OpenID Connect framework for Go. In Fosite before version 0.34.1, the OAuth 2.0 Client's registered redirect URLs and the redirect URL provided at the OAuth2 Authorization Endpoint where compared using strings.ToLower while they should have been compared wi...

CVE-2020-5300

In Hydra an OAuth2 Server and OpenID Certified™ OpenID Connect Provider written in Go, before version 1.4.0+oryOS.17, when using client authentication method 'privatekeyjwt' 1, OpenId specification says the following about assertion jti: "A unique identifier for the token, which can be used to...

CVE-2015-9435

The oauth2-provider plugin before 3.1.5 for WordPress has incorrect generation of random numbers...

CVE-2019-17268

The omniauth-weibo-oauth2 gem 0.4.6 for Ruby, as distributed on RubyGems.org, included a code-execution backdoor inserted by a third party. Versions through 0.4.5, and 0.5.1 and later, are unaffected...

CVE-2019-15150

In the OAuth2 Client extension before 0.4 for MediaWiki, a CSRF vulnerability exists due to the OAuth2 state parameter not being checked in the callback function...

CVE-2012-6134

Cross-site request forgery CSRF vulnerability in the omniauth-oauth2 gem 1.1.1 and earlier for Ruby allows remote attackers to hijack the authentication of users for requests that modify session state...

MCP Authorization in practice with Spring AI and OAuth2

Last month, we explored how to secure Spring AI MCP Servers1 with the OAuth2 authorization framework. In the conclusion of that article, we mentioned we'd explore using standalone Authorization Servers for MCP Security and deviate from the then-current specification. Since we published the articl...

MAL-2025-3928 Malicious code in xero_ruby_oauth2_app (npm)

--- -= Per source details. Do not edit below this line.=- Source: ghsa-malware df775937f934e6eee2161d71e8e61cc59dab858b11abd32721c7bb957ab91ee1 Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be...

golang.org/x/oauth2/jws: Unexpected memory consumption during token parsing in golang.org/x/oauth2/jws

A flaw was found in the golang.org/x/oauth2/jws package in the token parsing component. This vulnerability is made possible because of the use of strings.Splittoken, "." to split JWT tokens, which can lead to excessive memory consumption when processing maliciously crafted tokens with a large...

golang.org/x/oauth2/jws: Unexpected memory consumption during token parsing in golang.org/x/oauth2/jws

A flaw was found in the golang.org/x/oauth2/jws package in the token parsing component. This vulnerability is made possible because of the use of strings.Splittoken, "." to split JWT tokens, which can lead to excessive memory consumption when processing maliciously crafted tokens with a large...

Traefik affected by Go oauth2/jws Improper Validation of Syntactic Correctness of Input vulnerability

Summary We have encountered a security vulnerability being reported by our scanners for Traefik 2.11.22. - https://security.snyk.io/vuln/SNYK-CHAINGUARDLATEST-TRAEFIK33-9403297 Details It seems to target oauth2/jws library. PoC No steps to replicate this vulnerability Impact We have a strict...

GHSA-3WQC-MWFX-672P Traefik affected by Go oauth2/jws Improper Validation of Syntactic Correctness of Input vulnerability

Summary We have encountered a security vulnerability being reported by our scanners for Traefik 2.11.22. - https://security.snyk.io/vuln/SNYK-CHAINGUARDLATEST-TRAEFIK33-9403297 Details It seems to target oauth2/jws library. PoC No steps to replicate this vulnerability Impact We have a strict...

CVE-2025-32068 Revoking authorization of OAuth2 consumer does not invalidate refresh tokens

Incorrect Authorization vulnerability in The Wikimedia Foundation Mediawiki - OAuth Extension allows Authentication Bypass.This issue affects Mediawiki - OAuth Extension: from 1.39 through 1.43...

CVE-2025-32068

CVE-2025-32068 affects MediaWiki’s OAuth Extension (MediaWiki core). Vulnerable in versions 1.39–1.43 due to an Incorrect Authorization flaw that allows authentication bypass. CVSS v3.1: 5.4 (NETWORK, LOW complexity, LOW privileges) with Confidentiality and Integrity impact LOW; no Availability i...

CVE-2025-32068 Revoking authorization of OAuth2 consumer does not invalidate refresh tokens

Incorrect Authorization vulnerability in The Wikimedia Foundation Mediawiki - OAuth Extension allows Authentication Bypass.This issue affects Mediawiki - OAuth Extension: from 1.39 through 1.43...

Moodle 4.2.x < 4.2.10 Multiple Vulnerabilities

According to its self-reported version, the Moodle install hosted on the remote host is 4.1.x prior to 4.1.13, 4.2.x prior to 4.2.10, 4.3.x prior to 4.3.7, or 4.4.x prior to 4.4.3. It is, therefore, affected by multiple vulnerabilities. - A lesson activity password bypass through PHP loose...

Moodle 4.3.x < 4.3.7 Multiple Vulnerabilities

According to its self-reported version, the Moodle install hosted on the remote host is 4.1.x prior to 4.1.13, 4.2.x prior to 4.2.10, 4.3.x prior to 4.3.7, or 4.4.x prior to 4.4.3. It is, therefore, affected by multiple vulnerabilities. - A lesson activity password bypass through PHP loose...

golang.org/x/oauth2/jws: Unexpected memory consumption during token parsing in golang.org/x/oauth2/jws

A flaw was found in the golang.org/x/oauth2/jws package in the token parsing component. This vulnerability is made possible because of the use of strings.Splittoken, "." to split JWT tokens, which can lead to excessive memory consumption when processing maliciously crafted tokens with a large...

CVE-2025-31691

Missing Authorization vulnerability in Drupal OAuth2 Server allows Forceful Browsing.This issue affects OAuth2 Server: from 0.0.0 before 2.1.0...

Securing Spring AI MCP servers with OAuth2

Spring AI offers support for Model Context Protocol, or MCP for short, which allows AI models to interact with and access external tools and resources in a structured way. With Spring AI, developers can create their own MCP Servers and expose capabilities to AI models in just a few lines of code...