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
3,802 results · Feed
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Medium 6.4
Microsoft UFO: Authenticated Galaxy device registration can bypass WebSocket SSRF IP pinning via redirects
Microsoft UFO is an open-source framework for intelligent automation across devices and platforms. Prior to 3.0.9, authenticated device registration through /api/devices can supply a permitted attacker-controlled WebSocket endpoint while aip/transport/websock…
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Medium —
Langflow: SSRF in URL-taking components (protection disabled by default / warn-only, not applied to RSS, SearXNG, Web Search, Home Assistant, Glean, Docling)
### Summary Before **Langflow 1.10.3**, several built-in components sent server-side HTTP requests to URLs the flow author controls, with no SSRF enforcement. An authenticated user who can build or run flows could make the Langflow server reach loopback, RFC …
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Medium 5.3
Potential request forgery via spatial lookup byte values
An issue was discovered in Django 6.1 before 6.1.2, 6.0 before 6.0.9, and 5.2 before 5.2.18. An incomplete fix for CVE-2026-15307 in Django spatial lookups allows an attacker who can supply `bytes` values to cause the Django process to make network requests v…
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High 7.2
WordPress Instapage Plugin plugin <= 3.7.2 - Server Side Request Forgery (SSRF) vulnerability
Unauthenticated Server Side Request Forgery (SSRF) in Instapage Plugin <= 3.7.2 versions.
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High 7.2
WordPress PDF Smart Viewer for Elementor plugin <= 1.0.4 - Server Side Request Forgery (SSRF) vulnerability
Unauthenticated Server Side Request Forgery (SSRF) in PDF Smart Viewer for Elementor <= 1.0.4 versions.
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High 8.3
Dify: Unauthenticated Server-Side Request Forgery in /console/api/remote-files/upload endpoint
Dify is an open-source LLM app development platform. Prior to 1.13.0, the /console/api/remote-files/upload endpoint in api/controllers/web/remote_files.py accepted an attacker-controlled URL without authentication and caused the Dify server to retrieve it. A …
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Medium 4.3
Improper validation of Ops Manager configuration in MongoDB Kubernetes Operator
In MongoDB Controllers for Kubernetes, insufficient validation of Ops Manager backup configuration may allow a user who can modify an OpsManager custom resource to cause unintended administrative changes in Ops Manager. This affects deployments using Enterpri…
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Medium 4.0
Docling: SSRF guard bypass in remote resource fetching (DNS rebinding / multi-record resolution; no IP validation in HTML render mode)
Docling simplifies document processing by parsing diverse formats and providing integrations with the generative AI ecosystem. From 2.91.0 until 2.132.0, validate_url_safety in docling/backend/utils/image_resource_loader.py validates a hostname with a single …
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Medium 4.3
O2OA General url ActionUploadExcelWithUrl server-side request forgery
A flaw has been found in O2OA up to 10.0.1-ce. This affects the function ActionUploadExcelWithUrl of the file /x_general_assemble_control/jaxrs/excel/upload/with/url of the component General Module. Executing a manipulation of the argument fileUrl can lead to…
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Medium 6.0
Penpot: SSRF guard bypass via IPv6 transition addresses (NAT64/6to4/Teredo) in webhook delivery and media download
Penpot is an open-source design and prototyping platform. Prior to 2.18.0, app.util.ssrf/blocked-address? relies on Java InetAddress predicates that do not classify NAT64, 6to4, or Teredo addresses and applies additional CIDR checks only to IPv4 values. Explo…
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Low 2.7
Ghost: Server-Side Request Forgery in Webhook Trigger
Ghost is a Node.js content management system. From 1.18.0 until 6.27.0, an SSRF vulnerability in the webhooks feature allowed staff users to probe internal hosts from the Ghost server. This issue is fixed in version 6.27.0.
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Medium 4.0
Ghost: Private IP Filtering Bypass via IPv6 Transition Addresses
Ghost is a Node.js content management system. From 6.0.9 until 6.65.0, a validation issue allowed some functionality, such as Webmentions, to be abused by an unauthenticated user to make limited HTTP requests to hosts in the Ghost server's internal network on…
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Medium 4.0
Ghost: Server-Side Request Forgery in Bookmark Fetching
Ghost is a Node.js content management system. From 6.54.1 until 6.65.0, a validation issue allowed some functionality, such as Webmentions, to be abused by an unauthenticated user to make limited HTTP requests to hosts in the Ghost server's internal network. …
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Critical 9.9
Plane: SSRF via HTTP redirect in webhook delivery (allow_redirects not set)
Plane is an open-source project management tool. Prior to 1.4.0, the webhook delivery task in apps/api/plane/bgtasks/webhook_task.py calls requests.post() without allow_redirects=False and does not validate redirect targets. validate_url() blocks private, loo…
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High 7.6
Plane: OAuth Avatar Redirect SSRF Leads to Internal Data Exfiltration via Static Asset Endpoint
Plane is an open-source project management tool. Prior to 1.4.0, Plane's OAuth avatar synchronization flow fetches avatar_url from provider user data through a server-side HTTP request without internal IP validation and follows redirects by default. An attack…
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High 7.7
Plane: Incomplete fix of CVE-2026-27706 — SSRF still reachable on: missing is_blocked_ip (CGNAT/multicast) + DNS-rebinding TOCTOU
Plane is an open-source project management tool. Prior to 1.4.0, the fix for CVE-2026-27706 and GHSA-jcc6-f9v6-f7jw, an SSRF in work-item link unfurling shipped in v1.2.2, remains incomplete in the v1.3.1 GA release. Any authenticated project member can make …
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High 8.7
Plane: SSRF in Gitea OAuth
Plane is an open-source project management tool. Prior to 1.4.0, Plane validates GITEA_HOST only for its URL scheme and does not reject hosts that resolve to private or internal IP addresses. The four outbound requests in the Gitea OAuth flow are derived from…
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High 7.6
Plane: DNS Rebinding Bypass of CVE-2026-30242 SSRF Fix in Webhook Delivery
Plane is an open-source project management tool. Prior to 1.4.0, the fix for CVE-2026-30242 validates webhook IP addresses only when the webhook is created in apps/api/plane/app/serializers/webhook.py. The delivery task in apps/api/plane/bgtasks/webhook_task.…
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High 7.8
auto-changelog: code execution via untrusted in-repository configuration (handlebarsSetup/plugins), plus argument injection, path traversal, and SSRF
auto-changelog before 2.6.1 merges configuration from inside the target repository (the .auto-changelog file and the auto-changelog key in package.json) into its options, and honors security-sensitive options from that untrusted source. The handlebarsSetup op…
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High 8.4
In Eclipse Che versions 7.29.0 and later, the GET `/api/scm/resolve` and `POST /api/factory/resolver` endpoints pass an…
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Medium 6.3
Joomla Extension - svenbluege.de - Server-side request forgery in the Google Photos picker in Event Gallery extension < 6.6.0
Joomla Extension - svenbluege.de - Server-side request forgery in the Google Photos picker in Event Gallery extension < 6.6.0 - The Google Photos picker of the back-end upload page fetches the thumbnails of the picked images through the server, with the OAuth…
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High 8.8
CWE-918: Server-Side Request Forgery in the Progress Sitefinity Next.js Renderer SDK
CWE-918: Server-Side Request Forgery in the Progress @progress/sitefinity-nextjs-sdk npm package versions 15.1.8326 through 15.4.8637 may allow a remote attacker to make server-side requests to an attacker-controlled host, potentially exposing sensitive infor…
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Medium 6.7
LFI and GET SSRF via GStreamer and HLS playlists
LibreOffice can link to audio and video files from a document, and on Linux it plays them with GStreamer. A linked media file could be an HLS playlist that made GStreamer read the local files and remote URLs it listed while the document loaded, and their cont…
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Medium 6.7
LFI and GET SSRF via calcext:data-mappings and csv provider
LibreOffice Calc can link a cell range to an external csv data source, and the link is saved in the document. Such a link was fetched while the document loaded, so opening a document could read a local file into the sheet, or make a request to a host of the d…
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High 7.3
feelec-yishu feelcrm-os getCurlData Endpoint GoogleController.class.php server-side request forgery
A vulnerability was determined in feelec-yishu feelcrm-os 1.0.0. This affects an unknown part of the file App/Feelcrm/Index/Controller/GoogleController.class.php of the component getCurlData Endpoint. Executing a manipulation of the argument url can lead to s…
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Medium 4.7
Shaarli Admin Metadata Endpoint MetadataController.php MetadataController server-side request forgery
A security flaw has been discovered in Shaarli up to 0.16.3. The affected element is the function MetadataController of the file application/front/controller/admin/MetadataController.php of the component Admin Metadata Endpoint. Performing a manipulation of t…
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High 7.3
ChatGPTNextWeb NextChat Proxy Fallback proxy.ts proxyHandler server-side request forgery
A flaw has been found in ChatGPTNextWeb NextChat up to 2.16.1. This vulnerability affects the function proxyHandler of the file app/api/proxy.ts of the component Proxy Fallback Handler. This manipulation of the argument x-base-url causes server-side request f…
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High 7.5
Feehi CMS 2.1.1 contains a Server-Side Request Forgery (SSRF) vulnerability in the UEditor catchimage endpoint. The pri…
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Low 2.3
Zitadel before 4.16.2 SSRF via Organization Domain HTTP Verification
Zitadel before 4.16.2 contains a server-side request forgery vulnerability that allows attackers to make the server request internal resources through organization domain HTTP verification. The challenge fetch uses Go's default http.Get instead of the protect…
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High 7.3
SciPhi-AI R2R Retrieval Completion API Endpoint llm.py server-side request forgery
A vulnerability was identified in SciPhi-AI R2R up to 3.6.6. This vulnerability affects unknown code of the file py/shared/abstractions/llm.py of the component Retrieval Completion API Endpoint. Such manipulation of the argument generation_config.api_base lea…
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Medium 5.4
OpenAM before 16.1.3 SSRF via OpenID Connect Client jwks_uri
OpenAM before 16.1.3 contains a server-side request forgery vulnerability that allows attackers able to register or modify OAuth 2.0 clients to make OpenAM fetch internal resources via an unvalidated jwks_uri. Attackers can trigger unauthenticated fetches thr…
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High 7.7
UTMStack < 11.2.16 Server-Side Request Forgery via downloadPdf
UTMStack before 11.2.16 contains a server-side request forgery vulnerability that allows authenticated attackers to make the server request arbitrary internal resources by supplying an unvalidated url parameter to the PdfService.downloadPdf() method exposed v…
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Medium 5.0
UTMStack < 11.2.16 SSRF via IdentityProviderService
UTMStack before 11.2.16 contains a server-side request forgery vulnerability in IdentityProviderService.validateMetadataUrl() that allows authenticated attackers to make the server send requests to arbitrary internal or cloud metadata hosts by supplying a mal…
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High 7.6
Server-side request forgery in the tool server and remote agent connection handling in Loom for AWS
Server-side request forgery in the tool server and remote agent connection handling in Loom for AWS before 1.7.0 might allow an authenticated remote user to obtain the credentials of the application's own container role and to read responses from arbitrary in…
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Medium 6.2
Server-side request forgery in the OAuth2 discovery handling in Loom for AWS
Server-side request forgery in the OAuth2 discovery handling in Loom for AWS before 1.7.0 might allow an authenticated remote user to obtain the access token of another user of the deployment and to cause the application to issue requests to arbitrary interna…
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High 7.5
Weaver e-Bridge Unauthenticated Arbitrary File Read via saveYZJFile
Weaver e-Bridge contains an unauthenticated arbitrary file read vulnerability that allows remote attackers to access arbitrary files on the host system by supplying a file: URL to the downloadUrl parameter of the saveYZJFile endpoint. Attackers can exploit th…
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Medium —
rmcp OAuth client fetches server-controlled resource_metadata URLs
## Summary The `rmcp` OAuth client accepts a server-controlled `resource_metadata=` URL from the `WWW-Authenticate` header and fetches it without same-origin or private-network validation. An attacker-controlled MCP server can return a `401 WWW-Authenticate: …
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High 8.3
Next.js: Server-Side Request Forgery in Image Optimization
Next.js is a React framework for building full-stack web applications. From 16.0.0 until 16.3.8, Image Optimization can follow attacker-controlled DNS resolution for a remote URL that matches images.remotePatterns, allowing the optimized image fetch to reach …
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Medium 6.4
WordPress ThemeREX Addons plugin <= 2.46.0 - Server Side Request Forgery (SSRF) vulnerability
Server-Side Request Forgery (SSRF) vulnerability in ThemeREX Group ThemeREX Addons trx_addons allows Server Side Request Forgery.This issue affects ThemeREX Addons: from n/a through 2.46.0.
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Medium 5.0
YesWiki before 4.6.7 SSRF via Bazar valeur Action url Parameter
YesWiki before 4.6.7 contains a server-side request forgery vulnerability that allows page editors to make the server fetch arbitrary URLs via the url parameter of the Bazar valeur action. Attackers can embed the action with a champ parameter in wiki markup t…