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 4.0
Tautulli: Unauthenticated pms_image_proxy endpoint proxies arbitrary HTTP requests through the Plex Media Server
Tautulli is a Python based monitoring and tracking tool for Plex Media Server. Prior to version 2.17.0, the /pms_image_proxy endpoint accepts a user-supplied img parameter and forwards it to Plex Media Server's /photo/:/ transcode transcoder without authentic…
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Medium 6.3
SourceCodester RSS Feed Parser file_get_contents server-side request forgery
A flaw has been found in SourceCodester RSS Feed Parser 1.0. Affected by this issue is the function file_get_contents. This manipulation causes server-side request forgery. The attack is possible to be carried out remotely. The exploit has been published and …
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Medium 6.3
letta-ai letta File URL message_helper.py _convert_message_create_to_message server-side request forgery
A security vulnerability has been detected in letta-ai letta 0.16.4. This vulnerability affects the function _convert_message_create_to_message of the file letta/helpers/message_helper.py of the component File URL Handler. Such manipulation of the argument Im…
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Medium 5.3
AVideo has SSRF Protection Bypass via HTTP Redirect in Image Download Endpoints
WWBN AVideo is an open source video platform. In versions up to and including 26.0, `isSSRFSafeURL()` validates URLs against private/reserved IP ranges before fetching, but `url_get_contents()` follows HTTP redirects without re-validating the redirect target.…
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Medium 4.8
calibre has Server-Side Request Forgery in ebook viewer backend
calibre is a cross-platform e-book manager for viewing, converting, editing, and cataloging e-books. Prior to version 9.6.0, a Server-Side Request Forgery vulnerability in the background-image endpoint of calibre e-book reader's web view allows an attacker to…
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Medium 6.3
Page-Replica Page Replica Endpoint sitemap sitemap.fetch server-side request forgery
A vulnerability was identified in Page-Replica Page Replica up to e4a7f52e75093ee318b4d5a9a9db6751050d2ad0. The impacted element is the function sitemap.fetch of the file /sitemap of the component Endpoint. The manipulation of the argument url leads to server…
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Medium 6.5CVE-2026-33693 Public exploit
Lemmy's Activitypub-Federation has SSRF via 0.0.0.0 bypass in activitypub-federation-rust v4_is_invalid()
Lemmy is a link aggregator and forum for the fediverse. Prior to version 0.7.0-beta.9, the `v4_is_invalid()` function in `activitypub-federation-rust` (`src/utils.rs`) does not check for `Ipv4Addr::UNSPECIFIED` (0.0.0.0). An unauthenticated attacker controlli…
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Medium 4.7
Streamlit on Windows has Unauthenticated SSRF Vulnerability (NTLM Credential Exposure)
Streamlit is a data oriented application development framework for python. Streamlit Open Source versions prior to 1.54.0 running on Windows hosts have an unauthenticated Server-Side Request Forgery (SSRF) vulnerability. The vulnerability arises from improper…
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Medium 4.1
PinchTab has Unauthenticated Blind SSRF in Task Scheduler via Unvalidated callbackUrl
PinchTab is a standalone HTTP server that gives AI agents direct control over a Chrome browser. PinchTab v0.8.3 contains a server-side request forgery issue in the optional scheduler's webhook delivery path. When a task is submitted to `POST /tasks` with a us…
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Medium 4.3
OpenID Connect / OAuth client - Moderately critical - Server-side request forgery, Information disclosure - SA-CONTRIB-2026-025
Server-Side Request Forgery (SSRF) vulnerability in Drupal OpenID Connect / OAuth client allows Server Side Request Forgery.This issue affects OpenID Connect / OAuth client: from 0.0.0 before 1.5.0.
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Medium 5.3
Lychee has SSRF bypass via incomplete IP validation in Photo::fromUrl — loopback and link-local IPs not blocked
Lychee is a free, open-source photo-management tool. The patch introduced for GHSA-cpgw-wgf3-xc6v (SSRF via `Photo::fromUrl`) contains an incomplete IP validation check that fails to block loopback addresses and link-local addresses. Prior to version 7.5.1, a…
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Medium 6.8
Roadiz has Server-Side Request Forgery (SSRF) in roadiz/documents
Roadiz is a polymorphic content management system based on a node system that can handle many types of services. A vulnerability in roadiz/documents prior to versions 2.7.9, 2.6.28, 2.5.44, and 2.3.42 allows an authenticated attacker to read any file on the s…
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Medium 6.6
Saloon is vulnerable to SSRF and credential leakage via absolute URL in endpoint overriding base URL
Saloon is a PHP library that gives users tools to build API integrations and SDKs. Prior to version 4.0.0, when building the request URL, Saloon combined the connector's base URL with the request endpoint. If the endpoint was a valid absolute URL, the code us…
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Medium 5.4
IBM InfoSphere Information Server is vulnerable to server-side request forgery
IBM InfoSphere Information Server 11.7.0.0 through 11.7.1.6 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…
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Medium 5.4
IBM InfoSphere Information Server is vulnerable to server-side request forgery
IBM InfoSphere Information Server 11.7.0.0 through 11.7.1.6 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…
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Medium 5.4
IBM WebSphere Application Server Liberty Server-Side Request Forgery
IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.3 IBM WebSphere Application Server Liberty is vulnerable to server-side request forgery (SSRF). This may allow remote attacker to send unauthorized requests from the system, potentially leadin…
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Medium 4.9
AVideo: Full-Read SSRF Through Unvalidated statsURL Parameter in plugin/Live/test.php
## Summary The `plugin/Live/test.php` endpoint accepts a URL via the `statsURL` parameter and fetches it server-side using `file_get_contents()`, `curl_exec()`, or `wget`, returning the full response content in the HTML output. The only validation is a trivia…
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Medium 6.4
WordPress Contest Gallery plugin <= 28.1.2.1 - Server Side Request Forgery (SSRF) vulnerability
Server-Side Request Forgery (SSRF) vulnerability in Wasiliy Strecker / ContestGallery developer Contest Gallery contest-gallery allows Server Side Request Forgery.This issue affects Contest Gallery: from n/a through <= 28.1.2.1.
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Medium 5.0
Drupal Canvas - Moderately critical - Server-side request forgery, Information disclosure - SA-CONTRIB-2026-017
Server-Side Request Forgery (SSRF) vulnerability in Drupal Drupal Canvas allows Server Side Request Forgery.This issue affects Drupal Canvas: from 0.0.0 before 1.1.1.
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Medium 6.3
league/commonmark has an embed extension allowed_domains bypass
league/commonmark is a PHP Markdown parser. From version 2.3.0 to before version 2.8.2, the DomainFilteringAdapter in the Embed extension is vulnerable to an allowlist bypass due to a missing hostname boundary assertion in the domain-matching regex. An attack…
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Medium 6.4
Vikunja has SSRF via OpenID Connect Avatar Download that Bypasses Webhook SSRF Protections
Vikunja is an open-source self-hosted task management platform. Prior to version 2.2.1, the `DownloadImage` function in `pkg/utils/avatar.go` uses a bare `http.Client{}` with no SSRF protection when downloading user avatar images from the OpenID Connect `pict…
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Medium 6.4
Vikunja has SSRF via Todoist/Trello Migration File Attachment URLs that Allows Reading Internal Network Resources
Vikunja is an open-source self-hosted task management platform. Prior to version 2.2.1, the migration helper functions `DownloadFile` and `DownloadFileWithHeaders` in `pkg/modules/migration/helpers.go` make arbitrary HTTP GET requests without any SSRF protect…
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Medium 6.8
Connect CMS has SSRF in the External Page Migration Feature of its Page Management Plugin
Connect-CMS is a content management system. In versions on the 1.x series up to and including 1.41.0 and versions on the 2.x series up to and including 2.41.0, a Server-Side Request Forgery (SSRF) issue exists in the external page migration feature of the Pag…
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Medium 6.3
kalcaddle kodbox fileGet Endpoint editor.class.php PathDriverUrl server-side request forgery
A vulnerability was identified in kalcaddle kodbox 1.64. The affected element is the function PathDriverUrl of the file /workspace/source-code/app/controller/explorer/editor.class.php of the component fileGet Endpoint. Such manipulation of the argument path l…
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Medium 5.0
AVideo has SSRF in BulkEmbed Thumbnail Fetch that Allows Reading Internal Network Resources
WWBN AVideo is an open source video platform. Prior to version 26.0, the BulkEmbed plugin's save endpoint (`plugin/BulkEmbed/save.json.php`) fetches user-supplied thumbnail URLs via `url_get_contents()` without SSRF protection. Unlike all six other URL-fetchi…
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Medium 5.5
AVideo has SSRF in Scheduler Plugin via callbackURL Missing `isSSRFSafeURL()` Validation
WWBN AVideo is an open source video platform. Prior to version 26.0, the Scheduler plugin's `run()` function in `plugin/Scheduler/Scheduler.php` calls `url_get_contents()` with an admin-configurable `callbackURL` that is validated only by `isValidURL()` (URL …
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Medium 5.0
Frigate has SSRF vulnerability in /ffprobe endpoint
Frigate is a network video recorder (NVR) with realtime local object detection for IP cameras. Prior to version 0.16.3, the /ffprobe endpoint accepts arbitrary user-controlled URLs without proper validation, allowing Server-Side Request Forgery (SSRF) attacks…
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Medium 5.8
PinchTab has Blind SSRF via browser-side redirect bypass in /download URL validation
PinchTab is a standalone HTTP server that gives AI agents direct control over a Chrome browser. Versions 0.8.2 and below have a Blind SSRF vulnerability in the /download endpoint. The validateDownloadURL() function only checks the initial user-supplied URL, b…
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Medium 5.3
CKAN MCP Server: SSRF via base_url allows access to internal networks
CKAN MCP Server is a tool for querying CKAN open data portals. Versions prior to 0.4.85 provide tools including ckan_package_search and sparql_query that accept a base_url parameter, making HTTP requests to arbitrary endpoints without restriction. A CKAN port…
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Medium 6.8
Admidio Vulnerable to SSRF and Local File Read via Unrestricted URL Fetch in SSO Metadata Endpoint
Admidio is an open-source user management solution. In versions 5.0.0 through 5.0.6, unrestricted URL fetch in the SSO Metadata API can result in SSRF and local file reads. The SSO Metadata fetch endpoint at modules/sso/fetch_metadata.php accepts an arbitrary…
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Medium 5.1
Kargo: SSRF in Promotion http/http-download Steps Enables Internal Network Access and Data Exfiltration
Kargo manages and automates the promotion of software artifacts. In versions 1.4.0 through 1.6.3, 1.7.0-rc.1 through 1.7.8, 1.8.0-rc.1 through 1.8.11, and 1.9.0-rc.1 through 1.9.4, the http and http-download promotion steps allow Server-Side Request Forgery (…
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Medium 5.0
SuiteCRM vulnerable to authenticated SSRF via PDF export
SuiteCRM is an open-source, enterprise-ready Customer Relationship Management (CRM) software application. Prior to versions 7.15.1 and 8.9.3, it is possible to create PDF templates with `<img>` tags. When a PDF is exported using this template, the content (fo…
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Medium 6.0
OpenClaw < 2026.2.22 - Redirect Chain Bypass of Media Host Allowlist in MSTeams Attachment Handling
OpenClaw versions prior to 2026.2.22 fail to consistently validate redirect chains against configured mediaAllowHosts allowlists during MSTeams media downloads. Attackers can supply or influence attachment URLs to force redirects to non-allowlisted targets, b…
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Medium 6.5
Microsoft Bing Tampering Vulnerability
Server-side request forgery (ssrf) in Microsoft Bing allows an unauthorized attacker to perform tampering over a network.
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Medium 4.3
BMC FootPrints ITSM 20.20.02 <= 20.24.01.001 Blind SSRF in externalfeed/RSS
BMC FootPrints ITSM versions 20.20.02 through 20.24.01.001 contain a blind server-side request forgery vulnerability in the externalfeed/RSS API component that allows authenticated attackers to trigger arbitrary outbound requests from the server. Attackers ca…
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Medium 4.3
BMC FootPrints ITSM 20.20.02 <= 20.24.01.001 Blind SSRF in searchWeb
BMC FootPrints ITSM versions 20.20.02 through 20.24.01.001 contain a blind server-side request forgery vulnerability in the searchWeb API component that allows authenticated attackers to cause the server to initiate arbitrary outbound requests. Attackers can …
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Medium 5.8
Keycloak-services: blind server-side request forgery (ssrf) via http redirect handling in keycloak
A flaw was identified in Keycloak, an identity and access management solution, where it improperly follows HTTP redirects when processing certain client configuration requests. This behavior allows an attacker to trick the server into making unintended reques…
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Medium 6.3
frdel/agent0ai agent-zero document_query.py handle_pdf_document server-side request forgery
A weakness has been identified in frdel/agent0ai agent-zero 0.9.7. This affects the function handle_pdf_document of the file python/helpers/document_query.py. This manipulation causes server-side request forgery. The attack is possible to be carried out remot…
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Medium 4.7
taoofagi easegen-admin PPT File PPTUtil.java downloadFile server-side request forgery
A vulnerability was determined in taoofagi easegen-admin up to 8f87936ac774065b92fb20aab55b274a6ea76433. This issue affects the function downloadFile of the file - yudao-module-digitalcourse/yudao-module-digitalcourse-biz/src/main/java/cn/iocoder/yudao/module…
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Medium 4.3
SSRF bypass via IPv4-mapped IPv6 literals
Mattermost versions 11.3.x <= 11.3.0, 11.2.x <= 11.2.2, 10.11.x <= 10.11.10 fail to canonicalize IPv4-mapped IPv6 addresses before reserved IP validation which allows an attacker to perform SSRF attacks against internal services via IPv4-mapped IPv6 literals …