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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High 7.5
XML External Entity (XXE) vulnerability resulting in Server-Side Request Forgery (SSRF)
An XML External Entity (XXE) vulnerability allows malicious user to perform Server-Side Request Forgery (SSRF) via crafted XML input containing malicious external entity references. This issue affects Xerox FreeFlow Core versions up to and including 8.0.7. P…
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Medium 6.3
itwanger paicoding Image Save Endpoint ImageRestController.java save server-side request forgery
A vulnerability was identified in itwanger paicoding 1.0.0/1.0.1/1.0.2/1.0.3. The impacted element is the function Save of the file paicoding-web/src/main/java/com/github/paicoding/forum/web/common/image/rest/ImageRestController.java of the component Image Sa…
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Medium 6.3
psi-probe PSI Probe Whois Whois.java lookup server-side request forgery
A vulnerability has been found in psi-probe PSI Probe up to 5.3.0. This affects the function lookup of the file psi-probe-core/src/main/java/psiprobe/tools/Whois.java of the component Whois. The manipulation leads to server-side request forgery. The attack ma…
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Medium 4.3
Gvfs: gvfs ftp backend: information disclosure via untrusted pasv responses
A flaw was found in the FTP GVfs backend. A malicious FTP server can exploit this vulnerability by providing an arbitrary IP address and port in its passive mode (PASV) response. The client unconditionally trusts this information and attempts to connect to th…
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Medium 6.5
Astro is vulnerable to SSRF due to missing allowlist enforcement in remote image inferSize
Astro is a web framework. In versions 9.0.0 through 9.5.3, a bug in Astro's image pipeline allows bypassing `image.domains` / `image.remotePatterns` restrictions, enabling the server to fetch content from unauthorized remote hosts. Astro provides an `inferSiz…
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Low 2.1
ZITADEL has potential SSRF via Actions
ZITADEL is an open source identity management platform. Zitadel Action V2 (introduced as early preview in 2.59.0, beta in 3.0.0 and GA in 4.0.0) is a webhook based approach to allow developers act on API request to Zitadel and customize flows such the issue o…
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High 8.7
TerriaJS-Server has a domain validation bypass vulnerability in its proxy allowlist
TerriaJS-Server is a NodeJS Express server for TerriaJS, a library for building web-based geospatial data explorers. A validation bug in versions prior to 4.0.3 allows an attacker to proxy domains not explicitly allowed in the `proxyableDomains` configuration…
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Medium 5.8
Mailpit is Vulnerable to Server-Side Request Forgery (SSRF) via Link Check API
Mailpit is an email testing tool and API for developers. Prior to version 1.29.2, the Link Check API (/api/v1/message/{ID}/link-check) is vulnerable to Server-Side Request Forgery (SSRF). The server performs HTTP HEAD requests to every URL found in an email w…
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None 0.0
OpenKruise PodProbeMarker is Vulnerable to SSRF via Unrestricted Host Field
Kruise provides automated management of large-scale applications on Kubernetes. Prior to versions 1.8.3 and 1.7.5, PodProbeMarker allows defining custom probes with TCPSocket or HTTPGet handlers. The webhook validation does not restrict the Host field in thes…
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Medium 4.1
LangChain Community: redirect chaining can lead to SSRF bypass via RecursiveUrlLoader
LangChain is a framework for building LLM-powered applications. Prior to version 1.1.8, a redirect-based Server-Side Request Forgery (SSRF) bypass exists in `RecursiveUrlLoader` in `@langchain/community`. The loader validates the initial URL but allows the un…
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Critical 9.2CVE-2026-27739 Public exploit
Angular SSR is vulnerable to SSRF and Header Injection via request handling pipeline
The Angular SSR is a server-rise rendering tool for Angular applications. Versions prior to 21.2.0-rc.1, 21.1.5, 20.3.17, and 19.2.21 have a Server-Side Request Forgery (SSRF) vulnerability in the Angular SSR request handling pipeline. The vulnerability exist…
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Low 3.1
feiyuchuixue sz-boot-parent download server-side request forgery
A weakness has been identified in feiyuchuixue sz-boot-parent up to 1.3.2-beta. This vulnerability affects unknown code of the file /api/admin/common/files/download. Executing a manipulation of the argument url can lead to server-side request forgery. The att…
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High 7.7
Plane Vulnerable to Full Read SSRF via Favicon Fetching in "Add Link" Feature
Plane is an an open-source project management tool. Prior to version 1.2.2, a Full Read Server-Side Request Forgery (SSRF) vulnerability has been identified in the "Add Link" feature. This flaw allows an authenticated attacker with general user privileges to …
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High 8.6
esm.sh has SSRF localhost/private-network bypass in `/http(s)` module route
esm.sh is a no-build content delivery network (CDN) for web development. Versions up to and including 137 have an SSRF vulnerability (CWE-918) in esm.sh’s `/http(s)` fetch route. The service tries to block localhost/internal targets, but the validation is bas…
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High 8.7
esm.sh is vulnerable to full-response SSRF
esm.sh is a no-build content delivery network (CDN) for web development. In version 136, esm.sh is vulnerable to a full-response SSRF, allowing an attacker to retrieve information from internal websites through the vulnerability. Version 137 fixes the vulnera…
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Medium 5.0
Responsive Lightbox & Gallery <= 2.7.1 - Authenticated (Author+) Server-Side Request Forgery via Remote Library Image Upload
The Responsive Lightbox & Gallery plugin for WordPress is vulnerable to Server-Side Request Forgery in all versions up to, and including, 2.7.1. This is due to the use of `strpos()` for substring-based hostname validation instead of strict host comparison in …
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Medium 6.3
SourceCodester Website Link Extractor URL file_get_contents server-side request forgery
A vulnerability has been found in SourceCodester Website Link Extractor 1.0. This vulnerability affects the function file_get_contents of the component URL Handler. The manipulation leads to server-side request forgery. It is possible to initiate the attack r…
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High 8.6
changedetection.io Vulnerable to Server-Side Request Forgery (SSRF) via Watch URLs
changedetection.io is a free open source web page change detection tool. In versions prior to 0.54.1, changedetection.io is vulnerable to Server-Side Request Forgery (SSRF) because the URL validation function `is_safe_valid_url()` does not validate the resolv…
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Medium 4.6
Mastodon has SSRF via unvalidated FASP Provider base_url
Mastodon is a free, open-source social network server based on ActivityPub. FASP registration requires manual approval by an administrator. In versions 4.4.0 through 4.4.13 and 4.5.0 through 4.5.6, an unauthenticated attacker can register a FASP with an attac…
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Critical 10.0
DocLink .NET Remoting Unauthenticated Arbitrary File Read/Write RCE
Altec DocLink (now maintained by Beyond Limits Inc.) version 4.0.336.0 exposes insecure .NET Remoting endpoints over TCP and HTTP/SOAP via Altec.RDCHostService.exe using the ObjectURI "doclinkServer.soap". The service does not require authentication and is vu…
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High 8.6
AVideo has Authenticated Server-Side Request Forgery via downloadURL in aVideoEncoder.json.php
WWBN AVideo is an open source video platform. Prior to version 22.0, the `aVideoEncoder.json.php` API endpoint accepts a `downloadURL` parameter and fetches the referenced resource server-side without proper validation or an allow-list. This allows authentica…
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Medium 6.5
Payload has Server-Side Request Forgery (SSRF) in External File URL Uploads
Payload is a free and open source headless content management system. Prior to 3.75.0, a Server-Side Request Forgery (SSRF) vulnerability exists in Payload's external file upload functionality. When processing external URLs for file uploads, insufficient vali…
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Medium 5.7
Cloud Metadata SSRF Protection Bypass via IPv6 Resolution
Craft is a content management system (CMS). In versions 4.5.0-RC1 through 4.16.18 and 5.0.0-RC1 through 5.8.22, the SSRF validation in Craft CMS’s GraphQL Asset mutation uses `gethostbyname()`, which only resolves IPv4 addresses. When a hostname has only AAAA…
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Medium 6.3
DataLinkDC dinky Flink Proxy Controller FlinkProxyController.java proxyUba server-side request forgery
A vulnerability was found in DataLinkDC dinky up to 1.2.5. The impacted element is the function proxyUba of the file dinky-admin/src/main/java/org/dinky/controller/FlinkProxyController.java of the component Flink Proxy Controller. Performing a manipulation re…
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Medium 6.9CVE-2026-25545 Scanner template
Astro has Full-Read SSRF in error rendering via Host: header injection
Astro is a web framework. Prior to version 9.5.4, Server-Side Rendered pages that return an error with a prerendered custom error page (eg. `404.astro` or `500.astro`) are vulnerable to SSRF. If the `Host:` header is changed to an attacker's server, it will b…
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High 7.3
erzhongxmu JEEWMS UEditor getRemoteImage.jsp server-side request forgery
A vulnerability has been found in erzhongxmu JEEWMS 3.7. Affected by this issue is some unknown functionality of the file /plug-in/ueditor/jsp/getRemoteImage.jsp of the component UEditor. The manipulation of the argument upfile leads to server-side request fo…
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Medium 6.3
Tiandy Video Surveillance System 视频监控平台 CLSBODownLoad.java downloadImage server-side request forgery
A security flaw has been discovered in Tiandy Video Surveillance System 视频监控平台 7.17.0. This impacts the function downloadImage of the file /com/tiandy/easy7/core/bo/CLSBODownLoad.java. Performing a manipulation of the argument urlPath results in server-side r…
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Medium 6.3
JeecgBoot uploadImgByHttp server-side request forgery
A weakness has been identified in JeecgBoot 3.9.0. Affected by this vulnerability is an unknown functionality of the file /sys/common/uploadImgByHttp. Executing a manipulation of the argument fileUrl can lead to server-side request forgery. The attack may be …
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Medium 6.9
OpenClaw hardened cron webhook delivery against SSRF
OpenClaw is a personal AI assistant. In versions 2026.2.17 and below, Cron webhook delivery in src/gateway/server-cron.ts uses fetch() directly, so webhook targets can reach private/metadata/internal endpoints without SSRF policy checks. This issue was fixed …
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High 7.7
Wallos: SSRF via Redirect Bypass in Logo/Icon URL Fetch
Wallos is an open-source, self-hostable personal subscription tracker. Versions 4.6.0 and below contain a Server-Side Request Forgery (SSRF) vulnerability in the subscription and payment logo/icon upload functionality. The application validates the IP address…
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High 7.1
OpenSift: SSRF risk in URL ingestion endpoint
OpenSift is an AI study tool that sifts through large datasets using semantic search and generative AI. In versions 1.1.2-alpha and below, URL ingest allows overly permissive server-side fetch behavior and can be coerced into requesting unsafe targets. Potent…
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High 8.8
phpMoAdmin 1.1.5 Cross-Site Request Forgery via moadmin.php
phpMoAdmin 1.1.5 contains a cross-site request forgery vulnerability that allows attackers to perform unauthorized database operations by crafting malicious requests. Attackers can trick authenticated users into submitting GET requests to moadmin.php with par…
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High 7.2
WordPress Oxygen theme <= 6.0.8 - Server Side Request Forgery (SSRF) vulnerability
Server-Side Request Forgery (SSRF) vulnerability in Laborator Oxygen oxygen allows Server Side Request Forgery.This issue affects Oxygen: from n/a through <= 6.0.8.
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High 7.5
OpenClaw has a SSRF guard bypass via full-form IPv4-mapped IPv6 (loopback / metadata reachable)
OpenClaw is a personal AI assistant. Prior to version 2026.2.14, OpenClaw's SSRF protection could be bypassed using full-form IPv4-mapped IPv6 literals such as `0:0:0:0:0:ffff:7f00:1` (which is `127.0.0.1`). This could allow requests that should be blocked (l…
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High 7.6
OpenClaw Gateway tool allowed unrestricted gatewayUrl override
OpenClaw is a personal AI assistant. Prior to OpenClaw version 2026.2.14, the Gateway tool accepted a tool-supplied `gatewayUrl` without sufficient restrictions, which could cause the OpenClaw host to attempt outbound WebSocket connections to user-specified t…
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Medium 5.3
SSRF vulnerability have been discovered in OpenText™ XM Fax
Server-Side Request Forgery (SSRF) vulnerability in OpenText™ XM Fax allows Server Side Request Forgery. The vulnerability could allow an attacker to perform blind SSRF to other systems accessible from the XM Fax server. This issue affects XM Fax: 24.2.
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High 7.1
SillyTavern has Server-Side Request Forgery (SSRF) via Asset Download Endpoint that Allows Reading Internal Services
SillyTavern is a locally installed user interface that allows users to interact with text generation large language models, image generation engines, and text-to-speech voice models. In versions prior to 1.16.0, a Server-Side Request Forgery (SSRF) vulnerabil…
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Critical 9.8
Hyland Alfresco Transformation Service Argument Injection RCE
Hyland Alfresco Transformation Service allows unauthenticated attackers to achieve remote code execution through the argument injection vulnerability, which exists in the document processing functionality.
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Critical 9.8
Hyland Alfresco Transformation Service SSRF
Hyland Alfresco Transformation Service allows unauthenticated attackers to achieve server-side request forgery (SSRF) through the document processing functionality.
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Medium 6.9
Indico has Server-Side Request Forgery (SSRF) in multiple places
Indico is an event management system that uses Flask-Multipass, a multi-backend authentication system for Flask. Versions prior to 3.3.10 are vulnerable to server-side request forgery. Indico makes outgoing requests to user-provides URLs in various places. Th…