| Título | AstrBotDevs AstrBot 4.25.2 Server-Side Request Forgery (CWE-918) |
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| Descrição | # Technical Details
An authenticated SSRF exists in the plugin market registry flow implemented by `get_online_plugins()`, `_build_registry_source()`, and `_fetch_remote_md5()` in `astrbot/dashboard/routes/plugin.py` of AstrBot.
The application fails to validate attacker-supplied registry URLs before issuing server-side requests. The `custom_registry` query parameter is used directly as a fetch target and also used to derive a second `-md5.json` request. There is no allowlist, private-network filtering, scheme restriction, or redirect validation.
# Vulnerable Code
File: `astrbot/dashboard/routes/plugin.py`
Method: `get_online_plugins()`
Why: The handler reads `custom_registry` from the request, passes it into `_build_registry_source()`, and performs `session.get(url)` on the resulting attacker-controlled URL. `_fetch_remote_md5()` makes a second request to a derived attacker-influenced MD5 URL, creating an additional SSRF sink.
# Reproduction
1. Start a reachable HTTP listener that serves `/market-custom.json` and `/market-custom-md5.json`.
2. Authenticate to the AstrBot dashboard.
3. Send `GET /api/plugin/market_list?custom_registry=http://127.0.0.1:19001/market-custom.json&force_refresh=true`.
4. Observe the AstrBot server contacting the listener for both `/market-custom.json` and `/market-custom-md5.json`.
5. Repeat without `custom_registry` and confirm the observer receives no callbacks.
# Impact
- Authenticated users can force AstrBot to make requests to loopback, RFC1918, or otherwise internal HTTP services reachable from the host.
- The issue can be used for internal network probing, metadata access attempts, and interaction with internal-only management interfaces. |
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| Fonte | ⚠️ https://gist.github.com/YLChen-007/cd162554554c273a3a7c0330aa02f3f0 |
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| Utilizador | Eric-a (UID 96353) |
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| Submissão | 01/06/2026 10h19 (há 1 mês) |
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| Moderação | 11/07/2026 14h42 (1 month later) |
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| Estado | Aceite |
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| Entrada VulDB | 377807 [AstrBotDevs AstrBot até 4.25.2 market_list Endpoint plugin.py get_online_plugins custom_registry Elevação de Privilégios] |
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| Pontos | 20 |
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