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)
-
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].
-
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].
-
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
1,867 results · Clear filters · Feed
-
Medium 6.3
EnzoVezzaro mcp-dominican-layer parse-csv tool index.ts axios.get server-side request forgery
A flaw has been found in EnzoVezzaro mcp-dominican-layer up to 39dd373786712650097ad31db27d5c477c8f9c82. The affected element is the function axios.get of the file src/index.ts of the component parse-csv tool. This manipulation of the argument csvUrl causes s…
-
Medium 6.5
Repository migration SSRF via multi-answer DNS allow-list bypass
Repository migration SSRF via multi-answer DNS allow-list bypass
-
Medium 6.3
SSRF in restore-repo via unsanitized pull_request.yml Head.CloneURL
SSRF in restore-repo via unsanitized pull_request.yml Head.CloneURL
-
Medium 4.3
@jshookmcp/jshook: ICMP probe and traceroute skip local-network SSRF authorization
@jshookmcp/jshook is an MCP server that gives AI agents tools for JavaScript analysis and security research. In version 0.3.1, he network domain has a central SSRF authorization policy that blocks private, loopback, link-local, and reserved targets unless an …
-
Medium 6.0
WordPress Vehica Core plugin <= 1.0.104 - Server Side Request Forgery (SSRF) vulnerability
Subscriber Server Side Request Forgery (SSRF) in Vehica Core <= 1.0.104 versions.
-
Medium 4.9
Budibase: SSRF via bare fetch() in uploadUrl during AI table generation
Budibase is an open-source low-code platform. Prior to 3.39.4, uploadUrl in packages/server/src/utilities/fileUtils.ts used a bare server-side fetch for string attachment values passed by processAttachments in packages/server/src/sdk/workspace/ai/helpers/rows…
-
Medium 6.9
Microsoft UFO: IPv6 transition address bypass of SSRF guard in URL validation
Microsoft UFO open-source framework for intelligent automation across devices and platforms. Prior to 3.0.8, _is_blocked_ip in ufo/utils/url_security.py did not block NAT64 prefixes 64:ff9b::/96 and 64:ff9b:1::/48, the 6to4 prefix 2002::/16, or the Teredo pre…
-
Medium 5.1
Stored Server-Side Request Forgery in Remote-Instance Synchronization Allows Access to Internal Services in vulnerability-lookup
Vulnerability-Lookup contains a server-side request forgery (SSRF) vulnerability in the remote-instance synchronization functionality. Remote instance addresses were validated only for basic URL syntax before being stored, while the synchronization worker lat…
-
Medium 6.4
ProSolution WP Client < 2.0.9 - Subscriber+ SSRF via proSol_url_validate
The ProSolution WP Client WordPress plugin before 2.0.9 does not validate a user-supplied URL, and does not check the capability or nonce of the requester, before performing a server-side HTTP request with it, allowing any authenticated user, such as a subscr…
-
Medium 5.4
TypeBot Vulnerable to Server-Side Request Forgery (SSRF) in OpenAI Transcription Handler
TypeBot is a chatbot builder tool. Prior to version 3.16.0, the OpenAI "Create Transcription" action handler fetches a user-supplied audio URL using `fetch()` without applying the SSRF protection that exists elsewhere in the codebase. An attacker can direct t…
-
Medium 5.8
kkFileView: Unauthenticated SSRF via /addTask with fullfilename type-confusion bypass
kkFileView is a universal file online preview project based on Spring Boot. Prior to 5.0.1, the unauthenticated GET /addTask endpoint in kkFileView is omitted from TrustHostFilter and TrustDirFilter in server/src/main/java/cn/keking/config/WebConfig.java, all…
-
Medium 5.8
coturn peer-IP ACL canonicalization & scope bypass on the RFC 6062 TCP CONNECT relay path → internal-network SSRF and proven internal root RCE
Coturn is a free open source implementation of TURN and STUN Server. Prior to 4.13.1, good_peer_addr() in src/server/ns_turn_server.c uses ioa_addr_in_range() in src/client/ns_turn_ioaddr.c without canonicalizing IPv4-compatible, 6to4, and 64:ff9b::/96 NAT64 …
-
Medium 6.5
Microsoft SharePoint Server Spoofing Vulnerability
Server-side request forgery (ssrf) in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.
-
Medium 6.5
Microsoft Exchange Server Elevation of Privilege Vulnerability
Server-side request forgery (ssrf) in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.
-
Medium 6.5
.NET Information Disclosure Vulnerability
Inclusion of functionality from untrusted control sphere in .NET allows an unauthorized attacker to disclose information over a network.
-
Medium 4.7
CAI Content Credentials | Server-Side Request Forgery (SSRF) (CWE-918)
CAI Content Credentials is affected by a Server-Side Request Forgery (SSRF) vulnerability that could result in privilege escalation. Exploitation of this issue requires user interaction in that a victim must visit a maliciously crafted URL or interact with a …
-
Medium 5.3
Activepieces: Server-side request forgery in MCP tool validation endpoint
Activepieces is an open source AI workflow automation platform. Prior to 0.82.0, the POST /api/v1/projects/:projectId/mcp-server/validate-agent-mcp-tool endpoint makes an outbound HTTP or SSE request to a user-supplied serverUrl without URL validation or SSRF…
-
Medium 5.4
TypeBot's WhatsApp status forwarding uses unvalidated user-controlled URLs, allowing SSRF from the Typebot server
TypeBot is a chatbot builder tool. Prior to version 3.17.0, Typebot's WhatsApp status forwarding feature stores a workspace-configured webhook forwarding URL and later POSTs WhatsApp marketing/error status events to it from the server. The stored URL is only …
-
Medium 5.1
Server-Side Request Forgery via Favicon Retrieval in Lookyloo PlaywrightCapture
A Server-Side Request Forgery (SSRF) vulnerability existed in Lookyloo's PlaywrightCapture when the only_global_lookup option was enabled. PlaywrightCapture implements this option to prevent captures from accessing local, loopback, or otherwise non-public net…
-
Medium 5.4
Craft CMS 5.0.0-RC1 before 5.10.6 SSRF via GraphQL asset mutation
Craft CMS versions >= 5.0.0-RC1 before 5.10.6 and >= 4.0.0-RC1 before 4.18.2 contain a server-side request forgery vulnerability in the GraphQL save<Volume>Asset mutation, which fetches an attacker-supplied URL server-side. The anti-SSRF validation is incompl…
-
Medium 6.4
n8n before 2.32.1 SSRF Protection Bypass via MCP Client
n8n versions before 2.32.1 contain a server-side request forgery protection bypass vulnerability in the MCP Client node that allows authenticated users to bypass SSRF protections. Attackers can craft workflows that send requests to internal or blocked hosts w…
-
Medium 6.5
Apioo Fusio - Server-Side Request Forgery
A server-side request forgery vulnerability in Apioo Fusio 8.8.3 allows authenticated consumer-role users to make the server issue HTTP requests to internal network addresses by registering a webhook URL pointing to an internal host. The webhook registration …
-
Medium 6.5
Friendica Friendica - Server-Side Request Forgery
A server-side request forgery vulnerability in Friendica through the 2026.08-dev branch allows authenticated users with a free self-registered account to probe internal network services via the link-preview endpoint. The endpoint fetches any user-supplied URL…
-
Medium 6.5
HumanSignal Label Studio - Server-Side Request Forgery
A server-side request forgery vulnerability in HumanSignal Label Studio through 1.24.0.dev0 exists because SSRF_PROTECTION_ENABLED is set to false by default. The import-from-URL endpoint fetches any caller-supplied URL including internal loopback addresses o…
-
Medium 6.3
Mastodon: SSRF Protection Bypass via IPv4-compatible IPv6 Addresses
Mastodon is a free, open-source social network server based on ActivityPub. Prior to 4.4.21, 4.5.14, 4.6.4, and 4.7.0-beta.1, PrivateAddressCheck.private_address? in app/lib/private_address_check.rb normalized IPv4-mapped IPv6 addresses but did not recognize …
-
Medium 6.9
Webhook SSRF guard bypassed by IPv6 transition addresses (NAT64/6to4/Teredo pass is_global check) in vulnerability-lookup
The webhook URL validator in `website/notifications/webhooks.py` uses `ip.is_global` to reject non-public addresses after DNS resolution. IPv6 transition addresses (NAT64 `64:ff9b::/96`, 6to4 `2002::/16`, Teredo `2001:0000::/32`) are classified as globally ro…
-
Medium 5.0
All-in-One Video Gallery < 4.9.2 - Subscriber+ Server-Side Request Forgery via 'vdl' Parameter
All-in-One Video Gallery registers a public, unauthenticated file-download handler triggered by `?vdl=<post_id>` on any `aiovg_videos` post (`public/video.php`, `AIOVG_Public_Video::download_video()`), which reads the post's `mp4` meta value and streams that …
-
Medium 5.3
Podcast Player < 8.3.1 - Unauthenticated Server-Side Request Forgery
The Podcast Player WordPress plugin before 8.3.1 does not validate the destination of a server-side request built from user-supplied input, allowing unauthenticated attackers to make the server issue requests to arbitrary hosts and read back responses that pa…
-
Medium 6.3
dmitriiweb article-scraper-mcp server.py fetch_article server-side request forgery
A vulnerability was detected in dmitriiweb article-scraper-mcp 1.0.0. This vulnerability affects the function fetch_article of the file news_scraper_mcp/server.py. The manipulation of the argument url results in server-side request forgery. The attack may be …
-
Medium 5.3
PhialsBasement KoboldCPP-MCP-Server BaseConfigSchema index.ts makeRequest server-side request forgery
A weakness has been identified in PhialsBasement KoboldCPP-MCP-Server 1.0.0. Affected by this issue is the function makeRequest of the file src/index.ts of the component BaseConfigSchema. Executing a manipulation of the argument apiUrl can lead to server-side…
-
Medium 5.3
KS-GEN-AI jira-mcp-server add_attachment_from_public_url index.ts axios.get server-side request forgery
A vulnerability was found in KS-GEN-AI jira-mcp-server 0.2.0. This affects the function axios.get of the file src/index.ts of the component add_attachment_from_public_url. The manipulation of the argument imageUrl results in server-side request forgery. The a…
-
Medium 6.3
NocteDefensor LudusMCP read_range_config rangeConfig.ts server-side request forgery
A vulnerability has been found in NocteDefensor LudusMCP 1.0.24. Affected by this vulnerability is an unknown functionality of the file src/tools/rangeConfig.ts of the component read_range_config. The manipulation of the argument Source leads to server-side r…
-
Medium 6.3
anubissbe ProjectHub-Mcp Webhooks API complete_backend.js server-side request forgery
A weakness has been identified in anubissbe ProjectHub-Mcp up to 5.0.0. This affects an unknown function of the file backend-fix/complete_backend.js of the component Webhooks API. This manipulation of the argument url causes server-side request forgery. Remot…
-
Medium 6.3
aliyun alibabacloud-dataworks-mcp-server initResources.ts ReadResourceRequestSchema server-side request forgery
A security flaw has been discovered in aliyun alibabacloud-dataworks-mcp-server up to 1.0.43. The impacted element is the function ReadResourceRequestSchema of the file src/resources/initResources.ts. The manipulation of the argument request.params.uri result…
-
Medium 5.3
adenot mcp-google-search read_webpage index.ts server-side request forgery
A vulnerability was determined in adenot mcp-google-search up to 0.3.1. Impacted is an unknown function of the file src/index.ts of the component read_webpage. Executing a manipulation of the argument url can lead to server-side request forgery. The attack is…
-
Medium 6.3
HKUDS nanobot Provider-returned Image URL image_generation.py _download_image_data_url server-side request forgery
A vulnerability has been found in HKUDS nanobot up to 0.2.1. This affects the function _download_image_data_url of the file nanobot/providers/image_generation.py of the component Provider-returned Image URL Handler. The manipulation leads to server-side reque…
-
Medium 5.1
Nexus Repository 3 - Server-Side Request Forgery via Email Configuration Verification
Nexus Repository 3 contains a Server-Side Request Forgery (SSRF) vulnerability in the email configuration verification feature. A user holding the nexus:settings:update permission could submit arbitrary host and port values to the email test/verification endp…
-
Medium 6.5
OPeNDAP Hyrax SSRF and Credential Disclosure via Unvalidated Redirects
OPeNDAP Hyrax allows SSRF and credential disclosure via unvalidated HTTP redirects that bypass the AllowedHosts allowlist and leak Earthdata headers (User-Id, Echo-Token) to attacker-controlled endpoints.
-
Medium 6.3
TeamDavid: Server-Side Request Forgery (SSRF) via 'pathname' parameter in link storing functionality
Tobit Laboratories AG TeamDavid's Webbox 's link storing functionality (//ServerClient_celink.htm) accepts a “pathname” parameter, which can be set to network locations using UNC paths (e.g., “\\Server\Share”). The server processes these paths without validat…
-
Medium 6.3
TeamDavid: Server-Side Request Forgery (SSRF) via 'pathname' parameter in move archive functionality
Tobit Laboratories AG TeamDavid's Webbox 's move archive functionality (“!ArcEntryMove”) accepts an arbitrary path, which can be set to network locations using UNC paths (e.g., “\\Server\Share”). The server processes these paths without validation, resulting …