An incorrect permission check in Jenkins GitLab Plugin 1.9.6 and earlier allows attackers with global Item/Configure permission (while lacking Item/Configure permission on any particular job) to enumerate credential IDs of GitLab API token and Secret text credentials stored in Jenkins.

Jenkins GitLab Plugin 1.5.35 and earlier uses a non-constant time comparison function when checking whether the provided and expected webhook token are equal, potentially allowing attackers to use statistical methods to obtain a valid webhook token.

A cross-site request forgery (CSRF) vulnerability in Jenkins GitLab Authentication Plugin 1.17.1 and earlier allows attackers to trick users into logging in to the attacker's account.

Jenkins GitLab Plugin 1.5.34 and earlier does not escape multiple fields inserted into the description of webhook-triggered builds, resulting in a stored cross-site scripting (XSS) vulnerability exploitable by attackers with Item/Configure permission.

Jenkins GitLab Plugin 1.5.31 and earlier does not perform a permission check in an HTTP endpoint, allowing attackers with Overall/Read permission to enumerate credentials IDs of credentials stored in Jenkins.

Jenkins GitLab Authentication Plugin 1.13 and earlier stores the GitLab client secret unencrypted in the global config.xml file on the Jenkins controller where it can be viewed by users with access to the Jenkins controller file system.

Jenkins GitLab Authentication Plugin 1.13 and earlier records the HTTP Referer header as part of the URL query parameters when the authentication process starts, allowing attackers with access to Jenkins to craft a URL that will redirect users to an attacker-specified URL after logging in.

Jenkins Gitlab Authentication Plugin 1.5 and earlier does not perform group authorization checks properly, resulting in a privilege escalation vulnerability.

Jenkins Gitlab Hook Plugin 1.4.2 and earlier does not escape project names in the build_now endpoint, resulting in a reflected XSS vulnerability.

Jenkins GitLab Logo Plugin stores credentials unencrypted in its global configuration file on the Jenkins master where they can be viewed by users with access to the master file system.

An open redirect vulnerability in Jenkins Gitlab Authentication Plugin 1.4 and earlier in GitLabSecurityRealm.java allows attackers to redirect users to a URL outside Jenkins after successful login.

A session fixation vulnerability in Jenkins Gitlab Authentication Plugin 1.4 and earlier in GitLabSecurityRealm.java allows unauthorized attackers to impersonate another user if they can control the pre-authentication session.

A missing permission check in Jenkins GitLab Plugin 1.5.11 and earlier in the GitLabConnectionConfig#doTestConnection form validation method allowed attackers with Overall/Read permission to connect to an attacker-specified URL using attacker-specified credentials IDs obtained through another method, capturing credentials stored in Jenkins.

A cross-site request forgery vulnerability in Jenkins GitLab Plugin 1.5.11 and earlier in the GitLabConnectionConfig#doTestConnection form validation method allowed attackers to connect to an attacker-specified URL using attacker-specified credentials IDs obtained through another method, capturing credentials stored in Jenkins.

A exposure of sensitive information vulnerability exists in Jenkins Gitlab Hook Plugin 1.4.2 and older in gitlab_notifier.rb, views/gitlab_notifier/global.erb that allows attackers with local Jenkins master file system access or control of a Jenkins administrator's web browser (e.g. malicious extension) to retrieve the configured Gitlab token.