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 5.5
WebToffee Product Import Export for WooCommerce 2.5.1 before 2.6.8 SSRF via Redirects
WebToffee Product Import Export for WooCommerce 2.5.1 before 2.6.8 contains a server-side request forgery vulnerability in download_remote_file that allows shop_manager users to reach internal services via redirects. Attackers can submit a .csv URL that retur…
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Medium 4.8CVE-2026-71569 Public exploit
Apache Camel: Camel-A2A Push Notification Webhook Guard Accepts IPv6 Unique Local Addresses Reached Through a Host Name
Server-Side Request Forgery (SSRF) vulnerability in Apache Camel A2A component. This issue affects Apache Camel: from 4.21.0 before 4.22.2. WebhookUrlValidator classified a push notification webhook host in two places that did not agree. A host written as an …
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High 7.5
SSRF and JavaScript Execution in the Foxit Official Website's HTML-to-PDF Service
A server-side request forgery (SSRF) vulnerability exists in the Foxit official website’s HTML-to-PDF conversion service. Support for ZIP-formatted input can bypass restrictions on requests to internal IP addresses, potentially allowing discovery of internal …
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Medium 5.3
dfm feedfinder2 feedfinder2.py find_feeds server-side request forgery
A security flaw has been discovered in dfm feedfinder2 up to 0.0.4. This issue affects the function find_feeds of the file feedfinder2.py. Performing a manipulation results in server-side request forgery. Remote exploitation of the attack is possible. The pro…
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Medium 6.3
maotoumao MusicFreeDesktop Request Forwarder server-side request forgery
A vulnerability was identified in maotoumao MusicFreeDesktop 0.0.6/0.0.7/0.0.8. Impacted is an unknown function of the component Request Forwarder. The manipulation leads to server-side request forgery. Remote exploitation of the attack is possible. The explo…
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High 8.6
AVideo-Encoder: unauthenticated full-response server-side request forgery
AVideo is a video-sharing Platform. Before the initial remediation attempt in 8.1.0, `url_get_contents` in `objects/functions.php` accepts caller-controlled destinations after only `FILTER_VALIDATE_URL` syntax validation, without rejecting private, loopback, …
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Medium 6.2
Blombooru: administrator image-proxy server-side request forgery
Blombooru is a self-hosted personal booru for organizing and tagging private image collections. Prior to 1.40.0, the administrator-only `GET /proxy-image` endpoint, exposed as `/api/booru-import/proxy-image`, accepts a `url` query parameter and fetches it ser…
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High 8.6
Happy DOM: SSRF via iframe and link stylesheet when parsing untrusted HTML
Happy DOM is a JavaScript implementation of a web browser without its graphical user interface. Prior to 21.0.0, Happy DOM loads iframe src URLs and link rel="stylesheet" href URLs by default while parsing untrusted HTML on the server because disableIframePag…
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High 7.5
@happy-dom/server-renderer: ServerRendererServer Target-Origin Bypass SSRF / Open Proxy
Happy DOM is a JavaScript implementation of a web browser without its graphical user interface. Prior to 21.0.2, the Happy DOM server-renderer package's ServerRendererServer accepts unauthenticated HTTP/2 requests and resolves attacker-controlled :path values…
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High 7.7
Kserve: kserve: server-side request forgery via malicious storageuri
A flaw was found in KServe. A namespace-scoped user with create/update permissions on InferenceService custom resources can exploit this vulnerability by providing a malicious `storageUri`. This Server-Side Request Forgery (SSRF) vulnerability allows the `sto…
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High 8.2
mcp-sanitizer: URL sanitizer allows localhost/IPv6 loopback SSRF bypass via explicit port or bracketed IPv6
## URL sanitizer allows localhost/IPv6 loopback SSRF bypass via explicit port or bracketed IPv6 ### Summary `mcp-sanitizer` v1.3.3 fails to block Server-Side Request Forgery (SSRF) targets when a `localhost` URL includes an explicit port (e.g., `http://localh…
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Medium 4.7
Endatix: Blind second-order SSRF via anonymous form-submission file URLs (`SubmissionFileExtractor`)
Endatix is a self-hosted form and survey management platform with a headless API. Prior to 0.7.0, the anonymous `POST /forms/{formId}/submissions` endpoint stores attacker-controlled `JsonData` after checking only that the JSON is well formed. A file object w…
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High 8.3
Server Side Request Forgery in Multiple WSO2 Products Allows Access to Internal and External Resources
Due to the improper implementation of access control rules, malicious actors could perform a Server Side Request Forgery (SSRF) attack on affected WSO2 Products. Exploiting this vulnerability allows a malicious actor to access both internal and external resou…
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High 7.5
n8n before 1.123.83, 2.41.4, and 2.42.1 Slack Token Exfiltration via Slack Trigger
n8n before 1.123.83, 2.41.4, and 2.42.1 contains a server-side request forgery vulnerability in the Slack Trigger webhook that allows unauthenticated attackers to exfiltrate Slack tokens by bypassing signature verification when no signing secret is set. Attac…
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High 7.7
Azure Monitor access token disclosure via SSRF
A user with query access to an Azure Monitor data source in Grafana can cause server-side requests to an attacker-controlled endpoint that disclose the data source's Azure access token (server-side request forgery).
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Medium 4.2
HCL BigFix AEX is affected by multiple security vulnerabilities.
HCL BigFix AEX is affected by a Server-Side Request Forgery vulnerability, which could allow an attacker to cause the application to send unauthorized requests to external resources. Successful exploitation could lead to access to unintended services, sensiti…
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Medium 5.8
Smart Popup by Supsystic < 2.0.2 - Unauthenticated SSRF via MailChimp Groups Lookup
The Customer Engagement System WordPress plugin before 2.0.2 does not restrict access to its MailChimp interest-group lookup or validate the API key supplied to it, allowing unauthenticated users to make the server open connections to arbitrary internal hosts…
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Medium 5.3
WeKnora before 0.8.2 SSRF Guard Bypass via NAT64 IPv6 Addresses
WeKnora before 0.8.2 contains a server-side request forgery vulnerability in isRestrictedIP() that misclassifies NAT64-prefixed IPv6 addresses as public. Authenticated attackers can supply URLs resolving to NAT64 encodings of internal addresses via web_fetch …
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Medium 6.5
Model Context Protocol Python SDK: Client fetched server-chosen $ref URLs while validating tool results against output schemas
The Model Context Protocol Python SDK is the official Python SDK for Model Context Protocol servers and clients. From 1.10.0 until 1.30.0 and 2.2.0, ClientSession, ClientSessionGroup, and Client tool calls validate server-declared outputSchema documents with …
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Medium 6.1
CVE-2026-118172
The strapi/strapi (Core Admin / Webhook Runner) package is vulnerable to a semi-blind SSRF via a webhook follow-redirect. The webhook dispatcher automatically follows HTTP redirects without performing post-redirect IP resolution or RFC1918/link-local boundary…
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Medium 6.4
Homebox generic notifier SSRF via HTTP redirect after URL validation
HomeBox is a home inventory and organization system. Prior to version 0.27.0, Homebox validates generic notifier URLs with ValidateNotifierURL before creation, update, testing, and scheduled delivery, but shoutrrr sends the request through http.DefaultClient.…
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Medium 5.8
Vaultwarden: Icon endpoint SSRF fix bypass via second-stage favicon IP literal URLs
Vaultwarden is a Bitwarden-compatible server written in Rust. Prior to version 1.37.0, the Vaultwarden icon downloader validates the initial icon host and DNS results but passes favicon URLs parsed from attacker-controlled HTML to get_page_with_referer() with…
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Medium 4.6
A SSRF vulnerability found that enables access to internal Chrome Devtools Protocol APIs that can leak the JWT authenti…
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Medium 5.3
Artalk before 2.10.1 Unauthenticated SSRF via Comment Page Title Fetch
Artalk before 2.10.1 contains an unauthenticated server-side request forgery vulnerability that allows remote attackers to make the server fetch arbitrary URLs by submitting anonymous comments to /api/v2/comments. Attackers can set a page_key to an internal U…
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High 7.1
NVIDIA TensorRT-LLM contains a vulnerability where an attacker could cause a server-side request forgery. A successful …
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High 7.1
NVIDIA TensorRT-LLM contains a vulnerability where an attacker could cause a server-side request forgery. A successful …
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Medium 5.8
Dell PowerProtect Data Domain, Feature Release versions 7.7.1.0 through 8.7, LTS2024 release versions 7.13.1.0 through …
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Medium 5.4
User-controlled Duo host permits authenticated SSRF in Psono Server
Psono Server CE && EE versions 0.1.0 through 7.2.3 accepted a user-controlled host when configuring a personal Duo device and passed it to the Duo client without an allowlist or explicit timeout. An authenticated remote attacker could cause the server to conn…
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Medium 6.8
YesWiki before 4.7.0 SSRF via copyUrlToLocalFile in Bazar CSV Import
YesWiki before 4.7.0 contains a server-side request forgery vulnerability in the Bazar CSV import copyUrlToLocalFile() function that allows authenticated administrators to make arbitrary outbound requests by supplying crafted URLs in CSV file or image fields.…
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Medium 6.8
YesWiki before 4.7.0 Authenticated SSRF via Page Duplication API downloadFile
YesWiki before 4.7.0 contains a server-side request forgery vulnerability in DuplicationManager::downloadFile() that allows authenticated administrators to make arbitrary outbound requests via the files array. Attackers can POST file:// or internal URLs to /a…
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Low 2.7
Mattermost OpenID discovery endpoint request bypasses outbound connection filtering, allowing SSRF by a System Administrator
Mattermost versions 11.7.x <= 11.7.10 fail to apply outbound internal-connection filtering to the OpenID discovery endpoint request which allows a System Administrator to determine whether internal addresses and ports are reachable from the server via an unau…
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Medium 6.9
SSRF allowlist bypass via percent-encoded bracketed IPv6 or trailing-dot IP literal in hackney
Interpretation Conflict vulnerability in hackney_url in benoitc hackney allows Server Side Request Forgery via a percent-encoded bracketed IPv6 literal or an IP literal with a trailing dot. A host such as %5B%3A%3Affff%3A127%2E0%2E0%2E1%5D (decoding to [::fff…
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Medium 5.5
Kameleo Proxy Validation f.cs InternalController.TestProxy server-side request forgery
A vulnerability was determined in Kameleo up to 5.0.1.26. Affected is the function InternalController.TestProxy of the file client-engine-application/f.cs of the component Proxy Validation. Executing a manipulation of the argument host/port can lead to server…
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Medium 5.0
Frappe Builder before 1.36.1 SSRF Guard Bypass via HTTP Redirect
Frappe Builder before 1.36.1 contains a server-side request forgery vulnerability in builder/api.py where the assert_not_private_url() guard validates only the initial hostname before callers invoke requests.get(url) with default redirect-following and no IP …
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High 7.7
Frappe Builder before 1.36.1 SSRF via convert_to_webp
Frappe Builder versions before 1.36.1 contain a server-side request forgery vulnerability in the convert_to_webp API endpoint, which lacks the has_page_write access control applied to similar asset-ingest handlers and performs an unprotected requests.get call…
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High 7.3
geesondog RhaPHP Mp Module Media Proxy Show.php image server-side request forgery
A vulnerability was found in geesondog RhaPHP up to 7ae639ccf8dcb627faace096d030bd4cb4cfb905. Affected by this vulnerability is the function image of the file application/mp/controller/Show.php of the component Mp Module Media Proxy. The manipulation of the a…
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Medium 4.3
fr0tt benotes Bookmark Metadata Endpoint PostController.php getUrlInfo server-side request forgery
A vulnerability has been found in fr0tt benotes up to 2.8.1. This affects the function getUrlInfo of the file app/Http/Controllers/PostController.php of the component Bookmark Metadata Endpoint. The manipulation of the argument url leads to server-side reques…
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High 7.3
EyouCMS function.php remote_file_to_local server-side request forgery
A vulnerability was determined in EyouCMS up to 1.8.3. This impacts the function remote_file_to_local of the file application/function.php. Executing a manipulation can lead to server-side request forgery. It is possible to launch the attack remotely. The exp…
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Medium 6.3
KodCloud KodExplorer Remote Download web.function.php request_url_safe server-side request forgery
A flaw has been found in KodCloud KodExplorer up to 4.56. Affected is the function request_url_safe of the file app/function/web.function.php of the component Remote Download. This manipulation causes server-side request forgery. It is possible to initiate th…
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Medium 5.3CVE-2026-116205 Scanner template
YesWiki before 4.7.0 Unauthenticated SSRF via [[|URL]] Raw-Inclusion Syntax
YesWiki before 4.7.0 contains an unauthenticated server-side request forgery vulnerability that allows remote attackers to fetch arbitrary URLs by supplying [[|URL]] wiki syntax to the render handler. Attackers can pass the syntax in the content parameter of …