Argo CD login screen allows message spoofing if SSO is enabled

Summary

Argo CD is a declarative, GitOps continuous delivery tool for Kubernetes. A vulnerability was found in Argo CD prior to versions 2.3.4, 2.2.9, and 2.1.15 that allows an attacker to spoof error messages on the login screen when single sign on (SSO) is enabled. In order to exploit this vulnerability, an attacker would have to trick the victim to visit a specially crafted URL which contains the message to be displayed. As far as the research of the Argo CD team concluded, it is not possible to specify any active content (e.g. Javascript) or other HTML fragments (e.g. clickable links) in the spoofed message. A patch for this vulnerability has been released in Argo CD versions 2.3.4, 2.2.9, and 2.1.15. There are currently no known workarounds.

Timeline

1. May 20, 2022, 2:05 PM UTCCVE published
2. Apr 23, 2025, 2:07 PM UTCCISA SSVC assessment

   Exploitation: none · Automatable: no · Technical impact: partial

3. Apr 23, 2025, 6:25 PM UTCRecord last updated

Affected versions

• argoproj argo-cd

  fixed in 2.1.15; From 2.2.0 · fixed in 2.2.9; From 2.3.0 · fixed in 2.3.4

• github.com/argoproj/argo-cdGo

  All versions

• github.com/argoproj/argo-cd/v2Go

  From 2.0.0 · fixed in 2.1.15; From 2.2.0 · fixed in 2.2.9; From 2.3.0 · fixed in 2.3.4

• github.com/argoproj/argo-cd/v2Go

  From 2.3.0 · fixed in 2.3.4

• github.com/argoproj/argo-cd/v2Go

  From 2.2.0 · fixed in 2.2.9

• github.com/argoproj/argo-cd/v2Go

  From 2.0.0 · fixed in 2.1.15

• github.com/argoproj/argo-cdGo

  fixed in 2.1.15

References 4