JetBrains TeamCity before 2021.2.1 was vulnerable to reflected XSS.

In JetBrains TeamCity before 2021.2, health items of pull requests were shown to users who lacked appropriate permissions.

In JetBrains TeamCity before 2021.2.1, an unauthenticated attacker can cancel running builds via an XML-RPC request to the TeamCity server.

JetBrains TeamCity before 2021.2 was vulnerable to a Time-of-check/Time-of-use (TOCTOU) race-condition attack in agent registration via XML-RPC.

In JetBrains TeamCity before 2021.2.1, the Agent Push feature allowed selection of any private key on the server.

In JetBrains TeamCity before 2021.2, blind SSRF via an XML-RPC call was possible.

In JetBrains TeamCity before 2021.2, a logout action didn't remove a Remember Me cookie.

In JetBrains TeamCity before 2021.1.4, GitLab authentication impersonation was possible.

In JetBrains TeamCity before 2021.2.1, a redirection to an external site was possible.

kotlin: Not possible to lock dependencies for Multiplatform Gradle Projects

In JetBrains Kotlin before 1.6.0, it was not possible to lock dependencies for Multiplatform Gradle Projects.

In JetBrains Hub before 2021.1.13956, an unprivileged user could perform DoS.

In JetBrains Hub before 2021.1.13890, integration with JetBrains Account exposed an API key with excessive permissions.

JetBrains IntelliJ IDEA 2021.3.1 Preview, IntelliJ IDEA 2021.3.1 RC, PyCharm Professional 2021.3.1 RC, GoLand 2021.3.1, PhpStorm 2021.3.1 Preview, PhpStorm 2021.3.1 RC, RubyMine 2021.3.1 Preview, RubyMine 2021.3.1 RC, CLion 2021.3.1, WebStorm 2021.3.1 Preview, and WebStorm 2021.3.1 RC (used as Remote Development backend IDEs) bind to the 0.0.0.0 IP address. The fixed versions are: IntelliJ IDEA 2021.3.1, PyCharm Professional 2021.3.1, GoLand 2021.3.2, PhpStorm 2021.3.1 (213.6461.83), RubyMine 2021.3.1, CLion 2021.3.2, and WebStorm 2021.3.1.

In JetBrains Ktor before 1.6.4, nonce verification during the OAuth2 authentication process is implemented improperly.

In JetBrains TeamCity before 2021.1.3, the X-Frame-Options header is missing in some cases.

In JetBrains TeamCity before 2021.1.3, a newly created project could take settings from an already deleted project.

In JetBrains TeamCity before 2021.1.2, permission checks in the Agent Push functionality were insufficient.

In JetBrains TeamCity before 2021.1.2, permission checks in the Create Patch functionality are insufficient.

In JetBrains TeamCity before 2021.1.2, stored XSS is possible.

In JetBrains TeamCity before 2021.1.2, email notifications could include unescaped HTML for XSS.