The package github.com/runatlantis/atlantis/server/controllers/events before 0.19.7 are vulnerable to Timing Attack in the webhook event validator code, which does not use a constant-time comparison function to validate the webhook secret. It can allow an attacker to recover this secret as an attacker and then forge webhook events.

Atlantis is a self-hosted golang application that listens for Terraform pull request events via webhooks. Atlantis logs contains GitHub credentials (tokens `ghs_...`) when they are rotated. This enables an attacker able to read these logs to impersonate Atlantis application and to perform actions on GitHub. When Atlantis is used to administer a GitHub organization, this enables getting administration privileges on the organization. This was reported in #4060 and fixed in #4667 . The fix was included in Atlantis v0.30.0. All users are advised to upgrade. There are no known workarounds for this vulnerability.

Atlantis is a self-hosted golang application that listens for Terraform pull request events via webhooks. All versions of Atlantis publicly expose detailed version information through its /status endpoint. This information disclosure could allow attackers to identify and target known vulnerabilities associated with the specific versions, potentially compromising the service's security posture. This issue does not currently have a fix.