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
3,816 results · Feed
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Medium 6.9
Smarty: SSRF via redirect bypass of trusted_uri using {fetch}
Smarty is a template engine for PHP, facilitating the separation of presentation (HTML/CSS) from application logic. Prior to 4.5.7 and 5.8.2, depending on the release line, Smarty's {fetch} handling in libs/plugins/function.fetch.php and src/FunctionHandler/F…
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High 8.5
Wallos: SSRF via OIDC Token/UserInfo URL Configuration
Wallos is an open-source, self-hostable personal subscription tracker. Prior to version 4.9.6, Admin-configured OIDC token_url and user_info_url in includes/oidc/handle_oidc_callback.php:18-49 are used directly in curl_init() with zero SSRF filtering. Unlike …
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High 8.2
Wallos: SSRF via Test Email Notification - unvalidated SMTP host/port
Wallos is an open-source, self-hostable personal subscription tracker. Prior to version 4.9.6, POST /endpoints/notifications/testemailnotifications.php accepts smtpaddress and smtpport from POST body with zero SSRF validation. PHPMailer connects to attacker-s…
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Medium 5.4
WordPress MapSVG plugin <= 8.15.0 - Server Side Request Forgery (SSRF) vulnerability
Unauthenticated Server Side Request Forgery (SSRF) in MapSVG <= 8.15.0 versions.
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High 8.6
elFinder: SSRF protection bypass via DNS rebinding in the `fsock_get_contents()` fallback
elFinder is an open-source file manager for web, written in JavaScript using jQuery UI. Prior to 2.1.70, elFinder URL uploads in php/elFinder.class.php can bypass server-side request forgery protections when PHP cURL is unavailable because validate_address() …
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Medium 6.3
sdcb chats fetch-tools Endpoint McpController.cs McpController server-side request forgery
A vulnerability was detected in sdcb chats up to 1.12.0. This affects the function McpController of the file src/BE/web/Controllers/Users/Mcps/McpController.cs of the component fetch-tools Endpoint. The manipulation results in server-side request forgery. The…
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High 8.3
oasdiff actions resolve external $refs by default, enabling SSRF and disclosure of structured files on pull-request runs
oasdiff-action is a GitHub Action that detects breaking changes in OpenAPI specs and post a review on every pull request. Before version 0.0.51, the oasdiff actions resolved external $refs in the OpenAPI spec by default (allow-external-refs: true). When an ac…
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Medium 6.0
oasdiff does not enforce --allow-external-refs=false on the git-revision load path (SSRF / local file read)
oasdiff is a command-line and Go package that compares and detects breaking changes in OpenAPI specs. From version 1.13.2 through version 1.18.0, oasdiff did not enforce --allow-external-refs=false (library: openapi3.Loader.IsExternalRefsAllowed = false) when…
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High 7.1
MCPHub vulnerable to SSRF: a non-admin user can make mcphub request arbitrary URLs and read the response (OpenAPI proxy + transport dial)
MCPHub is a unified hub for centrally managing and dynamically orchestrating multiple MCP servers/APIs into separate endpoints with flexible routing strategies. Prior to version 1.0.32, an authenticated non-admin user can register a server pointing at an arbi…
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High 7.6
MCPHub: SSRF Guard Bypass via IPv6 Transition Addresses in URL Validation
MCPHub is a unified hub for centrally managing and dynamically orchestrating multiple MCP servers/APIs into separate endpoints with flexible routing strategies. Prior to version 1.0.32, MCPHub's SSRF guard in src/utils/ssrf.ts uses a custom isBlockedIpv6 func…
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Medium 5.3
NASA earthdata-search granules Endpoint handler.js OpenSearchGranuleSearchLambda server-side request forgery
A flaw has been found in NASA earthdata-search 1.0.0. Affected by this issue is the function OpenSearchGranuleSearchLambda of the file serverless/src/openSearchGranuleSearch/handler.js of the component granules Endpoint. Executing a manipulation of the argume…
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High 7.3
NASA earthdata-search scale Endpoint handler.js scaleImage server-side request forgery
A vulnerability was detected in NASA earthdata-search 1.0.0. Affected by this vulnerability is the function scaleImage of the file serverless/src/scaleImage/handler.js of the component scale Endpoint. Performing a manipulation results in server-side request f…
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Medium 6.8
@pdfme/common before 5.5.10 SSRF via Unvalidated URL Fetch
@pdfme/common before 5.5.10 contains a server-side request forgery vulnerability in the getB64BasePdf function that fetches arbitrary URLs without validation when basePdf is attacker-controlled. Attackers who control the basePdf template field can force serve…
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High 7.1
nodemailer before 9.0.1 File Read and SSRF via raw option
nodemailer before 9.0.1 fails to apply disableFileAccess and disableUrlAccess flags to message-level raw option, allowing authenticated attackers to read arbitrary files or perform server-side request forgery by supplying path or href properties. Attackers ca…
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Medium 4.7
yaojingang GEOFlow GenericHttpEndpointResolver.php DistributionController.isValidHttpEndpoint server-side request forgery
A vulnerability has been found in yaojingang GEOFlow up to 2.1.0. Impacted is the function DistributionController.isValidHttpEndpoint of the file app/Services/GeoFlow/GenericHttpEndpointResolver.php. Such manipulation of the argument endpoint_url leads to ser…
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Medium 5.9
Apache Shiro: Server-side POST request may be steered to an alternate host
When Apache Shiro is used with the Jakarta EE integration module, a low-privileged user can craft an HTTP request that causes the server to initiate a connection to an attacker-controlled URL and transmit attacker-controlled data. This vulnerability affects A…
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High 7.3
PowerJob Transport Endpoint TestController.java MuConnectionManager.getOrCreateConnection server-side request forgery
A vulnerability was identified in PowerJob up to 5.1.2. Impacted is the function MuConnectionManager.getOrCreateConnection of the file powerjob-server/powerjob-server-starter/src/main/java/tech/powerjob/server/web/controller/TestController.java of the compone…
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Critical 9.1
Server-side request forgery (SSRF) in the /har/test endpoint in QD 20220208 through 20250803. Fetcher.build_request() i…
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Medium 6.3
Forgejo Repository Migration is_migrate_allowed.go net.LookupIP server-side request forgery
A vulnerability was found in Forgejo up to 15.0.4. This issue affects the function net.LookupIP of the file services/migrations/allowlist/is_migrate_allowed.go of the component Repository Migration Handler. Performing a manipulation results in server-side req…
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High 7.5
jina-ai reader Server-Side Request Forgery via disabled private-address guard
jina-ai reader disables its private-address guard outside Google Cloud deployments, allowing unauthenticated attackers to perform server-side request forgery. Attackers can supply publicly resolvable hostnames mapping to private addresses to retrieve cloud me…
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Medium 5.3
Memos through 0.30.0 SSRF via Omitted CGNAT Address Range
Memos through 0.30.0 omits the 100.64.0.0/10 carrier-grade NAT address range from SSRF protection in its link-metadata fetcher, allowing unauthenticated attackers to bypass IP validation. Attackers can make the server request internal hosts in that range incl…
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Medium 5.8
In MITRE SAF Heimdall 2.11.6 through 2.13.x before 2.14.0, an SSRF issue allows remote attackers to access internal net…
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Critical 9.3
Icollect <= 1.0.0 - Unauthenticated Arbitrary File Read, SSRF and Path Traversal File Write via Default Publishing Password
The 爱采集数据采集和发布插件 WordPress plugin through 1.0.0 does not require a per-install secret for one of its unauthenticated endpoints, relying on a hardcoded default, and does not validate the URLs or destination paths it is given, allowing unauthenticated attackers…
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High 7.7
SmartAIPress <= 1.2.0 - Subscriber+ Server-Side Request Forgery via smartaipress_openai_upload_and_set_featured_image
The SmartAIPress WordPress plugin through 1.2.0 does not perform a capability check on one of its AJAX actions and does not validate a user-supplied URL before fetching it server-side, allowing users with subscriber-level access and above to make the site ret…
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Critical 9.1
Total Processing Card Payments for WooCommerce <= 7.3 - Unauthenticated SSRF leading to Payment Bypass and Gateway Credential Disclosure
The Total processing card payments for WooCommerce WordPress plugin through 7.3 does not validate a user-supplied path before using it to build a server-side verification request, and does not verify the authenticity of the response, allowing unauthenticated …
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Medium 4.3
Langflow is affected by multiple authentication bypass, path traversal, authorization, and server-side request forgery vulnerabilities
IBM Langflow OSS 1.0.0 through 1.11.1 is vulnerable to server-side request forgery (SSRF). This may allow an authenticated attacker to send unauthorized requests from the system, potentially leading to network enumeration or facilitating other attacks.
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High 8.7
Bifrost: SSRF deny-list incomplete: isPublicIP permits CGNAT, IPv6 6to4/NAT64, and site-local in FetchAndEncodeURL
Bifrost is an enterprise AI gateway for routing requests to model providers. Prior to 1.5.17, the isPublicIP function in core/providers/utils/fetch.go, reached through FetchAndEncodeURL for Bedrock and Vertex image or document URLs, classifies Carrier-Grade N…
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High 7.4
Gitingest Prefix-Based Git Host Check Enables Request Forgery and Token Disclosure
Gitingest through 0.3.1 fails to properly validate hostnames in _validate_host, accepting any host with a git., gitlab., or github. prefix regardless of known-hosts list membership. Attackers can submit URLs with attacker-controlled hostnames to trigger outbo…
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High 8.2
BISHENG Unauthenticated Server-Side Request Forgery via Workflow Report Callback
bisheng through 2.6.0-fix2 contains a server-side request forgery vulnerability in the POST /api/v1/workflow/report/callback endpoint that lacks authentication and applies no URL scheme restrictions or host filtering. Unauthenticated attackers can supply arbi…
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High 7.5
Portkey AI Gateway Server-Side Request Forgery via /v1/proxy/*
Portkey AI Gateway through 1.15.2 contains a server-side request forgery vulnerability in the /v1/proxy/* route that lacks requestValidator middleware. Attackers can set the x-portkey-custom-host header to internal addresses and forward requests with Authoriz…
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High 7.5
Qwen-Agent Server-Side Request Forgery via Caller-Supplied Document URL
Qwen-Agent through 0.0.34 contains a server-side request forgery vulnerability in the document parsing path that treats caller-supplied paths as URLs without scheme restriction or host validation. Attackers can reach the unauthenticated Gradio interface to ma…
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Medium 6.8
Logto Server-Side Request Forgery via OIDC SSO Connector Issuer URL
Logto through 1.42.0 contains a server-side request forgery vulnerability in the OIDC SSO connector creation endpoint that fails to validate the issuer URL parameter. Tenant administrators with Management API credentials can supply arbitrary internal URLs to …
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Medium 6.8
Logto Server-Side Request Forgery via webhook test endpoint
Logto through 1.42.0 contains a server-side request forgery vulnerability in the POST /api/hooks/:id/test endpoint that accepts arbitrary URLs without host validation. Tenant administrators with Management API tokens can make the server issue HTTP POST reques…
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Critical 10.0
Kubeflow Pipelines: Unauthenticated SSRF and HTTP smuggling in Kubeflow Pipelines frontend /_proxy/ route, bypasses ENABLE_AUTHZ=true
Kubeflow Pipelines enables users to build and deploy portable, scalable machine learning workflows. Prior to 2.17.0, the Kubeflow Pipelines frontend exposes an unauthenticated server-side request forgery vulnerability through the /_proxy/ route in frontend/se…
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Medium 5.3
Everest Forms <= 3.4.4 - Unauthenticated Server-Side Request Forgery via Upload Field 'Previous Value'
The Everest Forms plugin for WordPress is vulnerable to Server-Side Request Forgery in all versions up to, and including, 3.4.4. This is due to the `load_previous_field_value()` method in `class-evf-form-task.php` accepting arbitrary URL values from `$_POST` …
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High 7.1
Budibase Server before 3.41.3 SSRF via Query Import
Budibase Server before 3.41.3 contains a server-side request forgery vulnerability in the query import endpoint that fails to validate user-supplied URLs before fetching content. Attackers can submit arbitrary URLs to retrieve responses from internal services…
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High 7.6
Budibase Server before 3.41.3 SSRF with Credential Leakage
Budibase Server before 3.41.3 contains a server-side request forgery vulnerability in the datasource verify endpoint that allows builder-level users to supply arbitrary URLs without SSRF validation. Attackers can exploit this to leak internal CouchDB credenti…
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High 7.1
Budibase backend-core SSRF via incomplete default blacklist
Budibase backend-core (@budibase/backend-core, as used by @budibase/server) omits the shared address space range 100.64.0.0/10 from its default SSRF blacklist (DEFAULT_BLACKLIST) used by REST datasource query previews. When the default blacklist is active (i.…
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High 8.2
SiYuan before v3.8.1 SSRF via DNS-Rebinding TOCTOU
SiYuan versions before v3.8.1 contain a server-side request forgery vulnerability in the http_request and web_fetch agent tools that perform DNS resolution only at guard time without validating the connect-time resolution. Attackers can use DNS rebinding to a…
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Medium 4.3
A server-ide request forgery (SSRF) vulnerability in webhook in Synology Chat Server before 2.4.5-22148 allows remote a…