Coder allows organizations to provision remote development environments via Terraform. Prior to versions 2.29.7, 2.32.7, 2.33.8, and 2.34.2, `coder open app` opens external workspace-app URLs without validating the scheme or host. When an external app URL contains the `$SESSION_TOKEN` placeholder the CLI replaces it with the user's real session token before handing the URL to the OS open handler. Practical exploitation requires the victim to run `coder open app` against a workspace whose external app definition the attacker controls. Only a malicious template author can control external app URLs. The fix in versions 2.29.7, 2.32.7, 2.33.8, and 2.34.2 applies a URL-scheme allowlist in the CLI and limits `$SESSION_TOKEN` substitution to trusted destinations like the web frontend. As a workaround, avoid running `coder open app` for untrusted workspaces.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 2.29.17CPE matchmatch criteria | cpe:2.3:a:coder:coder:*:*:*:*:*:go:*:* | ||
>= 2.30.0, < 2.32.7CPE matchmatch criteria | cpe:2.3:a:coder:coder:*:*:*:*:*:go:*:* | ||
>= 2.33.0, < 2.33.8CPE matchmatch criteria | cpe:2.3:a:coder:coder:*:*:*:*:*:go:*:* | ||
>= 2.34.0, < 2.34.2CPE matchmatch criteria | cpe:2.3:a:coder:coder:*:*:*:*:*:go:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N
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