vulnerability / NVI-00017632 / Revision 1
Nezha has cross-site GET request that can trigger stored cron commands on a victim's agents
GitHub lists this reviewed advisory for github.com/nezhahq/nezha. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.
This report has not inspected your inventory, configuration, deployed build, reachability or evidence. A catalog listing and a severity score do not establish exposure or compromise.
01 / Meaning
Why it matters
Published affected context helps an owner decide what evidence to gather. This report has not examined your application.
7.1 high
GitHub source severity; exploitability and local consequence require separate evidence.
As of · GitHub Advisory Database
02 / Applicability
The affected context
Affected versions, configuration prerequisites and known exclusions are public. Confirm each one against the deployed service.
github.com/nezhahq/nezha
source listed>= 1.0.0, < 2.0.14
### Summary The dashboard exposes the cron manual-trigger action as an authenticated `GET /api/v1/cron/:id/manual` endpoint. Dashboard JWTs are sent in the `nz-jwt` cookie and configured with `SameSite=Lax`, which browsers include on top-level cross-site GET navigations. Because this state-changing GET endpoint has no CSRF token, origin validation, or fetch-metadata guard, an attacker can cause a logged-in Nezha user to trigger one of their existing cron tasks by navigating the victim's browser to the manual-trigger URL. If the targeted cron task sends a command to an online agent, the stored command is dispatched to the agent task stream. The attacker cannot create or modify the cron command through this issue alone, but can force execution of a command that the victim already saved and is authorized to run. ### Details Source-to-sink chain: 1. The dashboard registers the manual cron trigger as a GET route under the authenticated API group: `auth.GET("/cron/:id/manual", commonHandler(manualTriggerCron))` at `cmd/dashboard/controller/controller.go:131-134`. 2. JWT auth is cookie-enabled: `CookieName: "nz-jwt"`, `SendCookie: true`, `CookieSameSite: http.SameSiteLaxMode`, and `To
03 / Response
What to do next
- investigate
Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.
Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system. GitHub Advisory Database
A fixed release is not deployment evidence.
Check current vendor support and compatibility. After making a change, verify the deployed build and relevant runtime conditions. Keep the evidence, owner and time. An updated lockfile alone does not prove what is running.
04 / Limits
What this report cannot establish
- Customer inventory, deployment, reachability and exploitation have not been inspected.
05 / Provenance
Sources you can inspect
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- GHSA-8qhj-4f8c-j8qg ↗
GitHub Advisory Database · vendor advisory
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Public revision history
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- Revision 1 ·
First indexed by Null; source disclosure date is shown separately.