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
1,872 results · Clear filters · Feed
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Medium 6.5
Lemmy: SSRF and internal image disclosure in post link metadata via unvalidated og:image
Lemmy is a link aggregator and forum for the fediverse. Prior to version 0.19.18, Lemmy fetches metadata for user-supplied post URLs and, under the default StoreLinkPreviews image mode, downloads the preview image through local pict-rs. While the top-level pa…
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Medium 4.9
Flarum: Path traversal in LESS parser via theme color settings (incomplete fix for CVE-2023-27577)
Flarum is open-source forum software. Prior to versions 1.8.16 and 2.0.0-rc.1, Flarum's patch for CVE-2023-27577 restricted the @import and data-uri() LESS features in the custom_less setting, but the same restriction was never applied to other settings regis…
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Medium 6.3
router-for-me CLIProxyAPI api_tools.go server-side request forgery
A vulnerability has been found in router-for-me CLIProxyAPI 6.9.29. Affected by this issue is some unknown functionality of the file internal/api/handlers/management/api_tools.go of the component API Interface. The manipulation of the argument url leads to se…
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Medium 6.0
Wallos: Shared local webhook allowlist lets low-privilege users send arbitrary requests to allowlisted internal services
Wallos is an open-source, self-hostable personal subscription tracker. In versions 4.8.4 and prior, the webhook notification feature reuses an administrator-configured local-target allowlist for every logged-in user. Any normal user can fully control a webhoo…
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Medium 4.3
Wallos: SSRF CGNAT Bypass in subscription/payments Logo URL — is_cgnat_ip() Not Used in Inline Checks
Wallos is an open-source, self-hostable personal subscription tracker. Prior to version 4.8.1, the SSRF protection in endpoints/subscription/add.php (line 42) and endpoints/payments/add.php (line 40) uses an inline IP validation check (FILTER_FLAG_NO_PRIV_RAN…
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Medium 5.3
Weblate is Vulnerable to Authenticated SSRF via Project Backup Import bypassing validate_repo_url
Weblate is a web based localization tool. Prior to version 5.17.1, an authenticated user with project.add permission (default on hosted Weblate SaaS and for any user holding an active billing/trial plan) can import a crafted project backup ZIP whose component…
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Medium 5.0
Istio Vulnerable to SSRF via RequestAuthentication jwksUri
Istio is an open platform to connect, manage, and secure microservices. Prior to versions 1.28.6 and 1.29.2, when a RequestAuthentication resource is created with a jwksUri pointing to an internal service, istiod makes an unauthenticated HTTP GET request to t…
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Medium 6.8
Incomplete fix for CVE-2026-32812: SSRF in admidio
Admidio is an open-source user management solution. Prior to version 5.0.9, the incomplete SSRF fix in Admidio's fetch_metadata.php validates the resolved IP address but passes the original hostname-based URL to curl_init(), leaving a DNS rebinding TOCTOU win…
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Medium 5.8
OpenClaw < 2026.4.20 - Server-Side Request Forgery in QQBot Direct Media Upload
OpenClaw before 2026.4.20 contains a server-side request forgery vulnerability in QQBot direct media upload that skips URL validation. Attackers can bypass SSRF protections by sending crafted image URLs to uploadC2CMedia and uploadGroupMedia endpoints to rela…
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Medium 6.3
OpenClaw < 2026.4.10 - DNS Rebinding SSRF via Hostname Validation Bypass
OpenClaw before 2026.4.10 contains a server-side request forgery vulnerability in browser navigation policy that allows attackers to bypass hostname validation through DNS rebinding attacks. Attackers can exploit inconsistent hostname resolution between valid…
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Medium 6.9
Gotenberg unauthenticated blind SSRF via unfiltered webhook URL
Gotenberg is an API-based document conversion tool. In version 8.29.1, an unauthenticated attacker with network access can force the server to make outbound HTTP POST requests to arbitrary internal or external destinations by supplying a crafted URL in the Go…
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Medium 5.3
Incus blind SSRF via image import preflight HEAD request
Incus is an open source container and virtual machine manager. In versions prior to 7.0.0, the image import flow issues an outbound HEAD request to a user-supplied URL before validating the request against project restrictions such as restricted.images.server…
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Medium 6.4
Gutenverse – Ultimate WordPress FSE Blocks Addons & Ecosystem <= 3.5.3 - Authenticated (Contributor+) Server-Side Request Forgery via 'imageUrl'
The Gutenverse – Ultimate WordPress FSE Blocks Addons & Ecosystem plugin for WordPress is vulnerable to Server-Side Request Forgery in versions up to, and including, 3.5.3 via the import_images() function. This makes it possible for authenticated attackers, w…
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Medium 4.4
Server-Side Request Forgery (SSRF) in PlantUML Macro via 'server' parameter
PlantUML Macro is a macro for rendering UML diagrams from simple textual schemes. Prior to version 2.4.1, the PlantUML Macro is vulnerable to Server-Side Request Forgery (SSRF). The macro allows users to specify an alternative PlantUML server via the server p…
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Medium 6.3
pixelsock directus-mcp MCP index.ts validateUrl server-side request forgery
A security flaw has been discovered in pixelsock directus-mcp 1.0.0. This issue affects the function validateUrl of the file index.ts of the component MCP Interface. Performing a manipulation of the argument fileUrl results in server-side request forgery. The…
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Medium 6.3
JeecgBoot uploadImgByHttpEndpoint CommonController.java HttpFileToMultipartFileUtil.downloadImageData server-side request forgery
A security flaw has been discovered in JeecgBoot up to 3.9.1. This vulnerability affects the function CommonController.uploadImgByHttp/HttpFileToMultipartFileUtil.httpFileToMultipartFile/HttpFileToMultipartFileUtil.downloadImageData of the file CommonControll…
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Medium 4.4
Ona <= 1.26 - Authenticated (Administrator+) Blind Server-Side Request Forgery via 'download_link' Parameter
The Ona theme for WordPress is vulnerable to Server-Side Request Forgery in all versions up to, and including, 1.26 via the ona_activate_child_theme. This makes it possible for authenticated attackers, with administrator-level access and above, to make web re…
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Medium 6.3
JeecgBoot OpenApi Service OpenApiController.java OpenApiController.call server-side request forgery
A vulnerability was identified in JeecgBoot up to 3.9.1. This affects the function OpenApiController.add/OpenApiController.call of the file OpenApiController.java of the component OpenApi Service. Such manipulation of the argument originUrl database leads to …
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Medium 6.3
JeecgBoot LoadFile Endpoint FileDownloadUtils.jav checkPathTraversalBatch server-side request forgery
A vulnerability was determined in JeecgBoot up to 3.9.1. Affected by this issue is the function checkPathTraversalBatch of the file FileDownloadUtils.jav of the component LoadFile Endpoint. This manipulation of the argument files causes server-side request fo…
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Medium 6.5
Apache Neethi: Unrestricted HTTP Redirect Following in Policy References
Apache Neethi does not impose any restrictions on URIs when manually fetching remote policy references through the PolicyReference API. When an application explicitly calls the API to retrieve a policy from a remote URI, an outbound request is made for arbitr…
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Medium 6.5
Server-Side Request Forgery (SSRF) in Langflow URL Component
IBM Langflow Desktop 1.0.0 through 1.8.4 IBM Langflow 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…
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Medium 6.5
A Server-Side Request Forgery (SSRF) in the /themes/{name}/upgrade-from-uri endpoint of halo v2.22.14 allows authentica…
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Medium 4.3
A Server-Side Request Forgery (SSRF) in the /themes/-/install-from-uri endpoint of halo v2.22.14 allows authenticated a…
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Medium 5.0
A Server-Side Request Forgery (SSRF) in the /ureport/datasource/testConnection endpoint of SpringBlade v4.8.0 allows au…
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Medium 4.3
A Server-Side Request Forgery (SSRF) in the /plugins/{name}/upgrade-from-uri endpoint of halo v2.22.14 allows authentic…
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Medium 5.4
A Server-Side Request Forgery (SSRF) in the /plugins/-/install-from-uri endpoint of halo v2.22.14 allows authenticated …
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Medium 5.4
WordPress Share This Image plugin <= 2.14 - Server Side Request Forgery (SSRF) vulnerability
Server-Side Request Forgery (SSRF) vulnerability in ILLID Share This Image share-this-image allows Server Side Request Forgery.This issue affects Share This Image: from n/a through <= 2.14.
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Medium 4.3
Dell Disk Library for Mainframe, version(s) DLm 8700/2700 contain(s) a Server-Side Request Forgery (SSRF) vulnerability…
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Medium 6.3
Xuxueli xxl-job trigger Endpoint XxlJobServiceImpl.java triggerJob server-side request forgery
A weakness has been identified in Xuxueli xxl-job up to 3.3.2. The affected element is the function triggerJob of the file xxl-job-admin/src/main/java/com/xxl/job/admin/service/impl/XxlJobServiceImpl.java of the component trigger Endpoint. This manipulation o…
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Medium 6.5
OpenClaw < 2026.4.8 - Strict Browser SSRF Bypass via Playwright Redirect Handling
OpenClaw before 2026.4.8 contains a server-side request forgery vulnerability in Playwright redirect handling that allows attackers to bypass strict SSRF checks. Attackers can exploit request-time navigation to reach private targets that should be restricted …
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Medium 6.3
NVIDIA NemoClaw contains a vulnerability in the validateEndpointUrl() SSRF protection component, where an attacker coul…
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Medium 6.3
o2oa URL Fetching FileAction.java FileAction server-side request forgery
A weakness has been identified in o2oa up to 10.0. This affects the function FileAction of the file FileAction.java of the component URL Fetching. Executing a manipulation of the argument fileUrl can lead to server-side request forgery. It is possible to laun…
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Medium 6.3
dh1011 auto-favicon MCP Tool server.py generate_favicon_from_url server-side request forgery
A vulnerability was found in dh1011 auto-favicon up to f189116a9259950c2393f114dbcb94dde0ad864b. This issue affects the function generate_favicon_from_url of the file src/auto_favicon/server.py of the component MCP Tool. The manipulation of the argument image…
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Medium 6.3
HBAI-Ltd Toonflow-app getCodeByLink Endpoint getCodeByLink.ts fetch server-side request forgery
A vulnerability was found in HBAI-Ltd Toonflow-app up to 1.1.1. This affects the function fetch of the file src/routes/setting/vendorConfig/getCodeByLink.ts of the component getCodeByLink Endpoint. The manipulation of the argument Link results in server-side …
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Medium 4.7
pagekit download server-side request forgery
A vulnerability was identified in pagekit up to 1.0.18. Affected by this issue is some unknown functionality of the file /index.php/admin/system/update/download. The manipulation of the argument url leads to server-side request forgery. Remote exploitation of…
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Medium 6.3
IhateCreatingUserNames2 AiraHub2 Endpoint AiraHub.py sync_agents server-side request forgery
A vulnerability was found in IhateCreatingUserNames2 AiraHub2 up to 3e4b77fd7d48ed811ffe5b8d222068c17c76495e. Affected is the function connect_stream_endpoint/sync_agents of the file AiraHub.py of the component Endpoint. Performing a manipulation results in s…
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Medium 6.3
devlikeapro WAHA API Request media.controller.ts server-side request forgery
A flaw has been found in devlikeapro WAHA up to 2026.3.4. This affects an unknown function of the file src/api/media.controller.ts of the component API Request Handler. This manipulation causes server-side request forgery. The attack can be initiated remotely…
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Medium 6.5
LangChain: HTMLHeaderTextSplitter.split_text_from_url SSRF Redirect Bypass
LangChain is a framework for building agents and LLM-powered applications. Prior to langchain-text-splitters 1.1.2, HTMLHeaderTextSplitter.split_text_from_url() validated the initial URL using validate_safe_url() but then performed the fetch with requests.get…
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Medium 6.8
Axios: no_proxy bypass via IP alias allows SSRF
Axios is a promise based HTTP client for the browser and Node.js. Prior to 1.15.1 and 0.31.1, he fix for no_proxy hostname normalization bypass is incomplete. When no_proxy=localhost is set, requests to 127.0.0.1 and [::1] still route through the proxy instea…
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Medium 4.9
Xibo CMS has Authenticated Server-Side Request Forgery (SSRF) in Remote DataSet Functionality
Xibo is an open source digital signage platform with a web content management system and Windows display player software. An authenticated Server-Side Request Forgery (SSRF) vulnerability in versions prior to 4.4.1 allows users with DataSet permissions to mak…