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
3,822 results · Feed
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Medium 6.3
xiweicheng TMS HtmlUtil.java summary server-side request forgery
A flaw has been found in xiweicheng TMS up to 2.28.0. This affects the function Summary of the file src/main/java/com/lhjz/portal/util/HtmlUtil.java. This manipulation of the argument url causes server-side request forgery. It is possible to initiate the atta…
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Low 2.2
Church Admin <= 5.0.28 - Authenticated (Administrator+) Blind Server-Side Request Forgery via 'audio_url' Parameter
The Church Admin plugin for WordPress is vulnerable to Server-Side Request Forgery in all versions up to, and including, 5.0.28 due to insufficient validation of user-supplied URLs in the 'audio_url' parameter. This makes it possible for authenticated attacke…
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High 7.7
Arbitrary File Read in Google BigQuery Sink connector
Kafka Connect BigQuery Connector is an implementation of a sink connector from Apache Kafka to Google BigQuery. Prior to 2.11.0, there is an arbitrary file read in Google BigQuery Sink connector. Aiven's Google BigQuery Kafka Connect Sink connector requires G…
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Medium 6.9
Nu Html Checker (validator.nu) - Restriction bypass vulnerability allowing local SSRF
Nu Html Checker (validator.nu) contains a restriction bypass that allows remote attackers to make the server perform arbitrary HTTP/HTTPS requests to internal resources, including localhost services. While the validator implements hostname-based protections t…
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Medium 5.0
DK PDF – WordPress PDF Generator <= 2.3.0 - Authenticated (Author+) Server-Side Request Forgery
The DK PDF – WordPress PDF Generator plugin for WordPress is vulnerable to Server-Side Request Forgery in all versions up to, and including, 2.3.0 via the 'addContentToMpdf' function. This makes it possible for authenticated attackers, author level and above,…
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Medium 6.1
lucy-xss-filter before commit 7c1de6d allows an attacker to induce server-side HEAD requests to arbitrary URLs when the…
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High 8.4
SvelteKit Denial of service and possible SSRF when using prerendering
SvelteKit is a framework for rapidly developing robust, performant web applications using Svelte. Prior to 2.49.5, SvelteKit is vulnerable to a server side request forgery (SSRF) and denial of service (DoS) under certain conditions. From 2.44.0 through 2.49.4…
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Medium 5.3
Umbraco v8.14.1 - 'baseUrl' SSRF
Umbraco CMS v8.14.1 contains a server-side request forgery vulnerability that allows attackers to manipulate baseUrl parameters in multiple dashboard and help controller endpoints. Attackers can craft malicious requests to the GetContextHelpForPage, GetRemote…
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Medium 6.2
Nexus Repository 3 - Server-Side Request Forgery in Proxy Repository Configuration
Server-Side Request Forgery (SSRF) vulnerability in Sonatype Nexus Repository 3 versions 3.0.0 and later allows authenticated administrators to configure proxy repositories with URLs that can access unintended network destinations, potentially including cloud…
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High 8.6
External Control of File Name or Path and Server-Side Request Forgery (SSRF) in Kibana Google Gemini Connector
External Control of File Name or Path (CWE-73) combined with Server-Side Request Forgery (CWE-918) can allow an attacker to cause arbitrary file disclosure through a specially crafted credentials JSON payload in the Google Gemini connector configuration. This…
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High 7.2
GetContentFromURL <= 1.0 - Authenticated (Contributor+) Server-Side Request Forgery via 'url' Shortcode Attribute
The GetContentFromURL plugin for WordPress is vulnerable to Server-Side Request Forgery in all versions up to, and including, 1.0. This is due to the plugin using wp_remote_get() instead of wp_safe_remote_get() to fetch content from a user-supplied URL in the…
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Medium 5.4
Microsoft SharePoint Information Disclosure Vulnerability
Server-side request forgery (ssrf) in Microsoft Office SharePoint allows an authorized attacker to disclose information over a network.
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Low 3.4
A Server-Side Request Forgery (SSRF) vulnerability [CWE-918] vulnerability in Fortinet FortiSandbox 5.0.0 through 5.0.4…
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Medium 6.5
Insecure permissions in Hubert Imoveis e Administracao Ltda Hub v2.0 1.27.3 allows authenticated attackers with low-lev…
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Low 2.1
Metabase channel test endpoint can reach internal local addresses
Metabase is an open-source data analytics platform. Prior to 55.13, 56.3, and 57.1, self-hosted Metabase instances that allow users to create subscriptions could be potentially impacted if their Metabase is colocated with other unsecured resources. This vulne…
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Medium 5.8
Fulcio vulnerable to Server-Side Request Forgery (SSRF) via MetaIssuer Regex Bypass
Fulcio is a certificate authority for issuing code signing certificates for an OpenID Connect (OIDC) identity. Prior to 1.8.5, Fulcio's metaRegex() function uses unanchored regex, allowing attackers to bypass MetaIssuer URL validation and trigger SSRF to arbi…
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Medium 4.3
Featured Image from URL (FIFU) <= 5.3.1 - Authenticated (Contributor+) Server-Side Request Forgery via 'fifu_input_url'
The Featured Image from URL (FIFU) plugin for WordPress is vulnerable to Server-Side Request Forgery in all versions up to, and including, 5.3.1. This is due to insufficient validation of user-supplied URLs before passing them to the getimagesize() function i…
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Medium 5.1
Ghost has SSRF via External Media Inliner
Ghost is a Node.js content management system. In versions 5.38.0 through 5.130.5 and 6.0.0 through 6.10.3, a vulnerability in Ghost’s media inliner mechanism allows staff users in possession of a valid authentication token for the Ghost Admin API to exfiltrat…
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High 7.1
Mastodon has SSRF Protection bypass
Mastodon is a free, open-source social network server based on ActivityPub. By nature, Mastodon performs a lot of outbound requests to user-provided domains. Mastodon, however, has some protection mechanism to disallow requests to local IP addresses (unless s…
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Medium 6.5
Miniflux Media Proxy SSRF via /proxy endpoint allows access to internal network resources
Miniflux 2 is an open source feed reader. Prior to version 2.2.16, Miniflux's media proxy endpoint (`GET /proxy/{encodedDigest}/{encodedURL}`) can be abused to perform Server-Side Request Forgery (SSRF). An authenticated user can cause Miniflux to generate a …
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Medium 6.4
WordPress nK Themes Helper plugin <= 1.7.9 - Server Side Request Forgery (SSRF) vulnerability
Server-Side Request Forgery (SSRF) vulnerability in _nK nK Themes Helper nk-themes-helper allows Server Side Request Forgery.This issue affects nK Themes Helper: from n/a through <= 1.7.9.
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Medium 5.8CVE-2026-21859 Scanner template
Mailpit Proxy Endpoint is Vulnerable to Server-Side Request Forgery (SSRF)
Mailpit is an email testing tool and API for developers. Versions 1.28.0 and below have a Server-Side Request Forgery (SSRF) vulnerability in the /proxy endpoint, allowing attackers to make requests to internal network resources. The /proxy endpoint validates…
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Medium 5.3
INIM Electronics Smartliving SmartLAN/G/SI <=6.x Unauthenticated SSRF via GetImage
Smartliving SmartLAN/G/SI <=6.x contains an unauthenticated server-side request forgery vulnerability in the GetImage functionality through the 'host' parameter. Attackers can exploit the onvif.cgi endpoint by specifying external domains to bypass firewalls a…
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Critical 9.1
LibreChat is vulnerable to Server-Side Request Forgery due to missing restrictions
LibreChat is a ChatGPT clone with additional features. Version 0.8.1-rc2 is prone to a server-side request forgery (SSRF) vulnerability due to missing restrictions of the Actions feature in the default configuration. LibreChat enables users to configure agent…
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Medium 6.3
Knowage is vulnerable to blind server-side request forgery (SSRF)
Knowage is an open source analytics and business intelligence suite. Prior to version 8.1.37, there is a blind server-side request forgery vulnerability. The vulnerability allows attackers to send requests to arbitrary hosts/paths. Since the attacker is not a…
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Medium 4.9
WordPress External Media plugin <= 1.0.36 - Server Side Request Forgery (SSRF) vulnerability
Server-Side Request Forgery (SSRF) vulnerability in minnur External Media external-media allows Server Side Request Forgery.This issue affects External Media: from n/a through <= 1.0.36.
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Medium 4.7
invoiceninja Migration Import Import.php copy server-side request forgery
A security vulnerability has been detected in invoiceninja up to 5.12.38. The affected element is the function copy of the file /app/Jobs/Util/Import.php of the component Migration Import. The manipulation of the argument company_logo leads to server-side req…
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Medium 6.4
Xagio SEO <= 7.1.0.30 - Authenticated (Subscriber+) Server-Side Request Forgery
The Xagio SEO – AI Powered SEO plugin for WordPress is vulnerable to Server-Side Request Forgery in all versions up to, and including, 7.1.0.30 via the 'pixabayDownloadImage' function. This makes it possible for authenticated attackers, with Subscriber-level …
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Medium 5.0
Craft CMS vulnerable to Server-Side Request Forgery (SSRF) via GraphQL Asset Upload Mutation
Craft is a platform for creating digital experiences. In versions 5.0.0-RC1 through 5.8.20 and 4.0.0-RC1 through 4.16.16, the Craft CMS GraphQL `save_<VolumeName>_Asset` mutation is vulnerable to Server-Side Request Forgery (SSRF). This vulnerability arises b…
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High 7.9
Spinnaker vulnerable to SSRF due to improper restrictions on http from user input
Spinnaker is an open source, multi-cloud continuous delivery platform. Versions prior to 2025.1.6, 2025.2.3, and 2025.3.0 are vulnerable to server-side request forgery. The primary impact is allowing users to fetch data from a remote URL. This data can be the…
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Medium 6.5
evershop allows unauthenticated attackers to force server to initiate HTTP request via "GET /images" API
A Blind Server-Side Request Forgery (SSRF) vulnerability in evershop 2.1.0 and prior allows unauthenticated attackers to force the server to initiate an HTTP request via the "GET /images" API. The vulnerability occurs due to insufficient validation of the "sr…
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High 7.7
Emlog vulnerable to Server-Side Request Forgery (SSRF)
Emlog is an open source website building system. Versions up to and including 2.5.19 are vulnerable to server-side Out-of-Band (OOB) requests / SSRF via uploaded SVG files. An attacker can upload a crafted SVG to http[:]//emblog/admin/media[.]php which contai…
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Medium 4.7
go-sonic Theme Fetching API git_fetcher.go FetchTheme server-side request forgery
A flaw has been found in go-sonic sonic up to 1.1.4. The affected element is the function FetchTheme of the file service/theme/git_fetcher.go of the component Theme Fetching API. Executing a manipulation of the argument uri can lead to server-side request for…
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Medium 6.4
WP Import – Ultimate CSV XML Importer for WordPress <= 7.35 - Authenticated (Contributor+) Server-Side Request Forgery via Bitly Shortlink Bypass
The WP Import – Ultimate CSV XML Importer for WordPress plugin for WordPress is vulnerable to Server-Side Request Forgery in all versions up to, and including, 7.35. This is due to inadequate validation of the resolved URL after following Bitly shortlink redi…
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Medium 6.9
Cowrie < 2.9.0 Unrestricted wget/curl Emulation Enables SSRF-Based DDoS Amplification
Cowrie versions prior to 2.9.0 contain a server-side request forgery (SSRF) vulnerability in the emulated shell implementation of wget and curl. In the default emulated shell configuration, these command emulations perform real outbound HTTP requests to attac…
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Medium 5.4
WordPress WordPress & WooCommerce Scraper plugin, Import Data from Any Site plugin <= 1.0.7 - Server Side Request Forgery (SSRF) vulnerability
Server-Side Request Forgery (SSRF) vulnerability in extendons WordPress & WooCommerce Scraper Plugin, Import Data from Any Site wp_scraper allows Server Side Request Forgery.This issue affects WordPress & WooCommerce Scraper Plugin, Import Data from Any Site:…
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Medium 4.9
WordPress Genemy theme <= 1.6.6 - Server Side Request Forgery (SSRF) vulnerability
Server-Side Request Forgery (SSRF) vulnerability in Jthemes Genemy genemy allows Server Side Request Forgery.This issue affects Genemy: from n/a through <= 1.6.6.
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Medium 6.3
EyouCMS function.php saveRemote server-side request forgery
A security vulnerability has been detected in EyouCMS up to 1.7.7. Impacted is the function saveRemote of the file application/function.php. Such manipulation leads to server-side request forgery. It is possible to launch the attack remotely. The exploit has …
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High 7.3
FeehiCMS TimThumb timthumb.php server-side request forgery
A vulnerability was determined in FeehiCMS up to 2.1.1. Impacted is an unknown function of the file frontend/web/timthumb.php of the component TimThumb. Executing manipulation of the argument src can lead to server-side request forgery. The attack can be laun…
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Medium 4.9
WordPress Youzify plugin <= 1.3.7 - Server Side Request Forgery (SSRF) vulnerability
Server-Side Request Forgery (SSRF) vulnerability in Youzify Youzify youzify allows Server Side Request Forgery.This issue affects Youzify: from n/a through <= 1.3.7.