EUVD-2026-277226

fkie_cve-2026-33677

Vikunja is an open-source self-hosted task management platform. Prior to version 2.2.1, the `GET /api/v1/projects/:project/webhooks` endpoint returns webhook BasicAuth credentials (`basic_auth_user` and `basic_auth_password`) in plaintext to any user with read access to the project. While the existing code correctly masks the HMAC `secret` field, the BasicAuth fields added in a later migration were not given the same treatment. This allows read-only collaborators to steal credentials intended for authenticating against external webhook receivers. Version 2.2.1 patches the issue.

GHSA-7c2g-p23p-4jg3 — Vikjuna: Webhook BasicAuth Credentials Exposed to Read-Only Project Collaborators via API

Affected: Go: code.vikunja.io/api

## Summary

The `GET /api/v1/projects/:project/webhooks` endpoint returns webhook BasicAuth credentials (`basic_auth_user` and `basic_auth_password`) in plaintext to any user with read access to the project. While the existing code correctly masks the HMAC `secret` field, the BasicAuth fields added in a later migration were not given the same treatment. This allows read-only collaborators to steal credentials intended for authenticating against external webhook receivers.

## Details

When listing project webhooks, the `ReadAll` method in `pkg/models/webhooks.go` (line 203) only requires project read access:

```go // pkg/models/webhooks.go:203-244 func (w *Webhook) ReadAll(s *xorm.Session, a web.Auth, _ string, page int, perPage int) (result interface{}, resultCount int, numberOfTotalItems int64, err error) { p := &Project{ID: w.ProjectID} can, _, err := p.CanRead(s, a) // Only requires read permission if err != nil { return nil, 0, 0, err } if !can { return nil, 0, 0, ErrGenericForbidden{} }

// ... fetches webhooks from DB ...

for _, webhook := range ws { webhook.Secret = "" // HMAC secret is masked // BasicAuthUser and BasicAuthPassword are NOT masked if createdBy, has := users[webhook.CreatedByID]; has { webhook.CreatedBy = createdBy } }

return ws, len(ws), total, err } ```

The `Webhook` struct defines both fields with JSON serialization tags, so they are included in API responses:

```go // pkg/models/webhooks.go:63-64 BasicAuthUser st…

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EUVD-2026-277226

fkie_cve-2026-33677

GHSA-7c2g-p23p-4jg3 — Vikjuna: Webhook BasicAuth Credentials Exposed to Read-Only Project Collaborators via API