Weakness (CWE)
CWE-918: Server-Side Request Forgery
The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.
How to prevent it (3 mitigations)
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Implementation, Operation
If there is a known list of applications, IP, hostname, and/or domains to which the product is allowed to communicate, then use allowlists to ensure that outgoing requests are restricted to these known entities. The allowlists could be in the application code or possibly enforced by firewalls or network segmentation [REF-1511].
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Implementation, Operation
If the product is expected to be able to connect to arbitrary IP addresses or domains, consider using a denylist that includes private network addresses, internal domain names, etc. The denylist could be in the application code or possibly enforced by firewalls or network segmentation [REF-1511].
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Implementation
Assume all input is malicious. Use an "accept known good" input validation strategy, i.e., use a list of acceptable inputs that strictly conform to specifications. Reject any input that does not strictly conform to specifications, or transform it into something that does.
When performing input validation, consider all potentially relevant properties, including length, type of input, the full range of acceptable values, missing or extra inputs, syntax, consistency across related fields, and conformance to business rules. As an example of business rule logic, "boat" may be syntactically valid because it only contains alphanumeric characters, but it is not valid if the input is only expected to contain colors such as "red" or "blue."
Do not rely exclusively on looking for malicious or malformed inputs. This is likely to miss at least one undesirable input, especially if the code's environment changes. This can give attackers enough room to bypass the intended validation. However, denylists can be useful for detecting potential attacks or determining which inputs are so malformed that they should be rejected outright.
When constructing outgoing requests from input strings, use stringent allowlists that limit the character set based on the expected value of the parameter in the request. This will indirectly limit the scope of an attack, but this technique is less important than proper output encoding and escaping.
Source: MITRE CWE-918
1,406 results · Clear filters · Feed
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High 7.1
Server-Side Request Forgery in API Checker leads to Privilege Escalation
Server-Side Request Forgery vulnerability allows Privilege Escalation via API Checker extension. This issue affects Pandora FMS: from 777 through 800
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High 8.2
Open-WebSearch: SSRF in `fetchWebContent` MCP tool: bracketed IPv6 literals and non-resolving hostname check bypass `isPrivateOrLocalHostname`
Open-WebSearch is a multi-engine MCP server, CLI, and local daemon for agent web search and content retrieval. Prior to 2.1.7, isPublicHttpUrl / assertPublicHttpUrl in src/utils/urlSafety.ts do not recognize bracketed IPv6 literals and do not resolve DNS, whi…
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High 8.7
Link Preview JS: vunerable to IPv6 and internal loopback attacks
Link Preview JS extracts web links information. Prior to 4.0.1, the library did not check for IPv6 loopback attacks. There was also a DNS attack, where an address could be resolved into an internal IP. This could cause internal data leaks. This vulnerability …
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High 7.7
WWBN AVideo: SSRF Protection Bypass via HTTP Redirect and DNS Rebinding in isSSRFSafeURL()
WWBN AVideo is an open source video platform. In versions up to and including 29.0, two endpoints (plugin/AI/receiveAsync.json.php and objects/EpgParser.php) in AVideo call isSSRFSafeURL() to validate user-supplied URLs, then fetch them using bare file_get_co…
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High 8.5
Open edx Enterprise Service: SSRF via SAML metadata URL in sync_provider_data endpoint
The Open edx Enterprise Service app provides enterprise features to the Open edX platform. From 7.0.2 to 7.0.4, the sync_provider_data endpoint in SAMLProviderDataViewSet fetches SAML metadata from a URL stored in SAMLProviderConfig.metadata_source. An authen…
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High 8.5
Open edX Platform: Server-Side Request Forgery (SSRF) in SAML Provider Data Sync Endpoint
Open edX Platform enables the authoring and delivery of online learning at any scale. The sync_provider_data endpoint in SAMLProviderDataViewSet allows authenticated Enterprise Admin users to supply an arbitrary URL via the metadata_url POST parameter. This U…
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High 8.3
pyload-ng: non-admin SETTINGS users can redirect all outbound traffic through an attacker-controlled proxy
pyLoad is a free and open-source download manager written in Python. Prior to 0.5.0b3.dev100, the set_config_value() API method (@permission(Perms.SETTINGS)) in src/pyload/core/api/__init__.py gates security-sensitive options behind a hand-maintained allowlis…
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High 7.1
Server-Side Request Forgery (SSRF) in mlflow/mlflow
A Server-Side Request Forgery (SSRF) vulnerability exists in MLflow versions prior to 3.9.0. The `_create_webhook()` function in `mlflow/server/handlers.py` accepts a user-controlled `url` parameter without validation, and the `_send_webhook_request()` functi…
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High 8.6
pygeoapi 0.23.x: Unauthenticated SSRF via OGC API - Processes Subscriber
pygeoapi is a Python server implementation of the OGC API suite of standards. From version 0.23.0 to before version 0.23.3, OGC API process execution requests can use the subscriber object to requests to internal HTTP services. This issue has been patched in …
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High 7.1
New API: SSRF Filter Bypass via 0.0.0.0
New API is a large language mode (LLM) gateway and artificial intelligence (AI) asset management system. In versions 0.11.9-alpha.1 and prior, the SSRF protection introduced in v0.9.0.5 (CVE-2025-59146) and hardened in v0.9.6 (CVE-2025-62155) does not block t…
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High 7.7
FastGPT: Cloud metadata endpoint SSRF protection bypass via port specification, IPv6 mapping, hex/decimal IP encoding, and trailing dot
FastGPT is an AI Agent building platform. In versions 4.14.11 and prior, FastGPT's isInternalAddress() function in packages/service/common/system/utils.ts blocks cloud metadata endpoints using a fullUrl.startsWith() check against a hardcoded list. This check …
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High 7.2
n8n-MCP: Authenticated SSRF in n8n-mcp webhook and API client paths
n8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and operations. From version 2.18.7 to before version 2.50.2, there is an authenticated server-side request forgery vulnerability affecting the webhook trigger …
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High 8.3
n8n-mcp affected by path traversal, redirect-following SSRF, and telemetry payload exposure
## Impact `n8n-mcp` versions before 2.50.1 contained three independently-reported issues affecting deployments that run the n8n API integration: 1. **Caller-supplied identifiers were not validated before being used as URL path segments** by the n8n API client…
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High 8.2
Path traversal / SSRF in i18next-http-middleware via user-controlled language and namespace parameters
i18next-http-middleware is a middleware to be used with Node.js web frameworks like express or Fastify and also for Deno. Prior to version 3.9.3, i18next-http-middleware passes the user-controlled lng and ns values from getResourcesHandler directly into i18ne…
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High 7.7
SSRF bypass in PraisonAI
PraisonAI is a multi-agent teams system. Prior to version 1.6.32, the URL checking logic in PraisonAI has a logical flaw that could be bypassed by attackers, leading to SSRF attacks. This issue has been patched in version 1.6.32.
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High 8.7
Angular: SSRF via protocol-relative and backslash URLs in Angular Platform-Server
Angular is a development platform for building mobile and desktop web applications using TypeScript/JavaScript and other languages. Prior to versions 19.2.21, 20.3.19, 21.2.9, and 22.0.0-next.8, a Server-Side Request Forgery (SSRF) vulnerability exists in @an…
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High 7.1
PromptHub: Authenticated SSRF via IPv6 filter bypass in `POST /api/skills/fetch-remote`
PromptHub is an all-in-one AI toolbox for prompt, skill, and agent management. From version 0.4.9 to before version 0.5.4, apps/web/src/routes/skills.ts exposes an authenticated endpoint POST /api/skills/fetch-remote that fetches a user-supplied URL server-si…
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High 7.9
Server-side request forgery vulnerability in GitHub Enterprise Server notebook viewer via URL parser confusion
A server-side request forgery (SSRF) vulnerability was identified in the GitHub Enterprise Server notebook viewer that allowed an attacker to access internal services by exploiting URL parser confusion between the validation layer and the HTTP request library…
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High 8.1
Azure Monitor Action Group Notification System Elevation of Privilege Vulnerability
Server-side request forgery (ssrf) in Azure Notification Service allows an authorized attacker to elevate privileges over a network.
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High 8.5
n8n-MCP: IPv4-mapped IPv6 addresses bypass SSRF protection in validateUrlSync(), enabling full SSRF for SDK embedders
n8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and operations. In versions 2.47.4 through 2.47.13, the SDK embedder path (N8NDocumentationMCPServer constructor, getN8nApiClient(), and validateInstanceContext…
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High 7.7
FreeScout vulnerable to SSRF via Helper::sanitizeRemoteUrl: redirect destination not re-validated, allowing internal HTTP / cloud-metadata access
FreeScout is a free help desk and shared inbox built with PHP's Laravel framework. Prior to version 1.8.217, Helper::sanitizeRemoteUrl() in app/Misc/Helper.php follows HTTP redirects via curlGetLastRedirectedUrl() but then re-validates the original URL instea…
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High 7.7
Incomplete fix for CVE-2026-33399: SSRF in Wallos
Wallos is an open-source, self-hostable personal subscription tracker. In versions 4.8.4 and prior, the incomplete SSRF fix in Wallos validates webhook URLs via gethostbyname() but passes the original hostname to cURL without CURLOPT_RESOLVE pinning on 10 of …
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High 8.3
monetr is vulnerable to server-side request forgery in Lunch Flow link creation and refresh
monetr is a budgeting application for recurring expenses. Prior to version 1.12.5, a server-side request forgery (SSRF) vulnerability in monetr's Lunch Flow integration allowed any authenticated user on a self-hosted instance to cause the monetr server to iss…
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High 8.6
OpenClaw < 2026.4.22 - Server-Side Request Forgery in Zalo Photo URL Validation
OpenClaw before 2026.4.22 contains a server-side request forgery vulnerability in the Zalo plugin's sendPhoto function that fails to validate outbound photo URLs through the SSRF guard. Attackers can bypass SSRF protection by providing malicious photo URLs to…
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High 7.7
OpenClaw < 2026.4.10 - Incomplete Navigation Guard Coverage in Browser Interactions
OpenClaw before 2026.4.10 contains an incomplete navigation guard vulnerability that allows attackers to trigger navigation without complete SSRF policy enforcement. Browser press/type style interactions, including pressKey and type submit flows, can bypass p…
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High 7.7
OpenClaw < 2026.4.5 - Second-hop SSRF via CDP /json/version WebSocket URL
OpenClaw before 2026.4.5 contains a server-side request forgery vulnerability in the CDP /json/version WebSocket endpoint that allows attackers to pivot to untrusted second-hop targets. The webSocketDebuggerUrl response field is not properly validated, enabli…
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High 7.2
Cisco Unity Connection Server-Side Request Forgery Vulnerability
A vulnerability in the web UI of Cisco Unity Connection Web Inbox could allow an unauthenticated, remote attacker to conduct SSRF attacks through an affected device. This vulnerability is due to improper input validation for specific HTTP requests. An attacke…
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High 7.8CVE-2026-40280 Scanner template
Gotenberg SSRF via case-insensitive URL scheme bypass in webhook and downloadFrom deny-lists
Gotenberg is an API-based document conversion tool. In versions 8.30.1 and earlier, the default private-IP deny-lists for the --webhook-deny-list and --api-download-from-deny-list flags use a case-sensitive regular expression (^https?://) to match URL schemes…
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High 8.3
twenty-server SSRF protection bypass via IPv4-mapped IPv6 address normalization
Twenty is an open source CRM built with NestJS (Node.js). In versions 1.18.0 and earlier, the SSRF protection in twenty-server's SecureHttpClientService can be bypassed using IPv4-mapped IPv6 addresses in URL IP literals. Node.js's URL parser normalizes IPv4-…
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High 8.6
Eclipse BaSyx Java Server SDK vulnerable to Server-Side Request Forgery
In Eclipse BaSyx Java Server SDK versions prior to 2.0.0-milestone-10, the Operation Delegation feature fails to validate the destination URI of delegated requests. An unauthenticated remote attacker can exploit this design flaw to force the BaSyx server to e…
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High 7.7
OpenClaw < 2026.4.10 - SSRF Policy Bypass in Existing-Session Browser Interaction Routes
OpenClaw before 2026.4.10 contains a server-side request forgery policy bypass vulnerability in existing-session browser interaction routes. Attackers can bypass SSRF navigation guards to interact with or navigate to unauthorized targets without policy enforc…
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High 7.7
OpenClaw < 2026.4.14 - Server-Side Request Forgery via Private Network Navigation
OpenClaw before 2026.4.14 contains a server-side request forgery vulnerability in browser SSRF policy that allows private-network navigation by default. Attackers can exploit this misconfiguration to access internal services or metadata endpoints through brow…
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High 8.2
OpenClaw < 2026.4.12 - Server-Side Request Forgery via QQBot Reply Media URL Handling
OpenClaw before 2026.4.12 contains a server-side request forgery vulnerability in QQBot reply media URL handling that allows attackers to fetch arbitrary content. Attackers can exploit this by providing malicious media URLs that trigger SSRF requests, with fe…
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High 8.5
OpenClaw < 2026.4.10 - SSRF Policy Bypass in Browser Tabs Action Routes
OpenClaw before 2026.4.10 contains a server-side request forgery policy bypass vulnerability in the browser tabs action select and close routes. Attackers can bypass configured browser SSRF policy protections by exploiting the /tabs/action endpoint to perform…
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High 7.7
OpenClaw < 2026.4.14 - Internal Page Content Exposure via Browser Snapshot and Screenshot Routes
OpenClaw before 2026.4.14 contains an improper access control vulnerability in browser snapshot, screenshot, and tab routes that fail to consistently validate the final browser target after navigation. Authenticated callers can bypass SSRF restrictions to exp…
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High 7.2
Royal Addons for Elementor <= 1.7.1057 - Authenticated (Contributor+) Server-Side Request Forgery via CSV URL Parameter
The Royal Elementor Addons plugin for WordPress is vulnerable to Server-Side Request Forgery in versions up to, and including, 1.7.1057. This is due to insufficient validation of user-supplied URLs in the render_csv_data() function, which can be bypassed by i…
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High 7.2
PixelYourSite Pro <= 12.5.0.1 - Unauthenticated Blind Server-Side Request Forgery via 'urls[]' Parameter
The PixelYourSite Pro – Your smart PIXEL (TAG) Manager plugin for WordPress is vulnerable to Server-Side Request Forgery in all versions up to, and including, 12.5.0.1 via the scan_video. This makes it possible for unauthenticated attackers to make web reques…
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High 7.3
Algovate xhs-mcp MCP mcp.server.ts xhs_publish_content server-side request forgery
A vulnerability was found in Algovate xhs-mcp 0.8.11. This affects the function xhs_publish_content of the file src/server/mcp.server.ts of the component MCP Interface. Performing a manipulation of the argument media_paths results in server-side request forge…
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High 8.5
OpenClaw < 2026.4.8 - Server-Side Request Forgery in QQ Bot Media Fetch Paths
OpenClaw before 2026.4.8 contains a server-side request forgery vulnerability in QQ Bot media download paths that bypass SSRF protection. Attackers can exploit unprotected media fetch endpoints to access internal resources and bypass allowlist policies.
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High 7.6
OpenClaw < 2026.4.8 - Server-Side Request Forgery Policy Bypass via Interaction-Triggered Navigation
OpenClaw before 2026.4.8 contains a server-side request forgery policy bypass vulnerability allowing attackers to trigger navigations bypassing normal SSRF checks. Attackers can exploit browser interactions to bypass SSRF protections and access restricted res…