Ghost: Paid gift memberships obtainable at minimal cost via the donations feature

Impact A vulnerability in Ghost's public donation checkout flow allowed an unauthenticated attacker to obtain full paid gift memberships for a minimal payment. No customer or member data was exposed, and the issue could not be used to steal money from a site or its members. Vulnerable versions Th...

Ghost: Member existence leak via magic link sign-in response

Impact A discrepancy in responses from the members signin endpoints made it possible for an unauthenticated attacker to determine whether a given email address belongs to a registered member of a Ghost site. Vulnerable versions This vulnerability is present in Ghost from v5.18.0 up to v6.21.0...

XSS in Ghost's ActivityPub client

Impact The ActivityPub client in Ghost was vulnerable to JavaScript injection on posts shared by a maliciously customised ActivityPub server. Vulnerable Versions This vulnerability is present in the @tryghost/activitypub package up to v3.0.8. All prior versions are also affected. Patches...

Ghost: Session Fixation in Ghost Admin

Impact Ghost Admin did not invalidate existing sessions on login which could have allowed for session fixation attacks. Successful exploitation would have required another vulnerability on the same domain where Ghost Admin was hosted. Vulnerable versions This vulnerability is present in Ghost fro...

Ghost: Theme Upload Path Traversal

Impact A vulnerability in custom themes allowed a staff user to write files outside of the uploads directory. This could be used to alter the behavior of the installation. Vulnerable versions This vulnerability is present in Ghost from v0.10.0 up to v6.54.0. Patches v6.54.1 contains a fix for thi...

Ghost: Database Backup Path Traversal

Impact An Administrator-level user could remotely overwrite certain files on the filesystem leading to integrity and availability issues. Vulnerable versions This vulnerability is present in Ghost from 1.20.1 up to v6.54.0. Patches v6.54.1 contains a fix for this issue. How to update For...

Ghost: Server-Side Request Forgery in Image Fetching

Impact A Server-Side Request Forgery SSRF in Ghost Admin allowed any staff-level user to perform a blind HTTP GET request against internal hosts. No output was returned, but this could have been used to probe open ports on internal hosts. Vulnerable versions This vulnerability is present in Ghost...

Ghost: Blind Password Hash Disclosure in Ghost Admin API

Impact Any staff-level user was able to leak the hashed passwords of other staff users. An offline password-guessing attack against the hashes could lead to account takeover if successful, but Device Verification should have prevented an attacker from logging in with a recovered password. Dependi...

Ghost: Mobiledoc image-size fetch SSRF

Impact When re-rendering posts, Ghost would refetch missing image dimensions by issuing an outbound HTTP request to the URL stored on an image card — without restricting that URL to trusted image hosts. An authenticated staff user able to create or edit posts could therefore point an image card a...

Ghost: Server-side request forgery via DNS rebinding in external request handling

Impact Ghost’s private-IP check for outbound HTTP requests could be bypassed via DNS rebinding, allowing an attacker to coerce the Ghost server into reaching hosts on internal networks through features that issue external fetches. Vulnerable versions This vulnerability is present in Ghost from...

Ghost: Private IP filtering bypass to make server-side requests to internal services

Impact When making an external request, it is possible to bypass the IP filter that ensures the request isn't going to an internal service using an IPv6 literal which maps to a private IPv4 address. Vulnerable versions This vulnerability is present in Ghost from v6.0.9 up to v6.21.0. Patches...

Ghost: Archived Offers can be Redeemed

Impact A missing validation check allowed users to redeem subscription offers that were no longer active. Vulnerable versions This vulnerability is present in Ghost from v4.22.0 up to v6.54.0. Patches v6.54.1 contains a fix for this issue. How to update For self-hosters using Docker, find Docker'...

Ghost: File Upload Content-Type Spoofing

Impact Insufficient validation of the client-supplied Content-Type on Ghost's Admin API file upload endpoint allowed uploaded files to be served from the site with an attacker-chosen content type on S3/GCS storage backends. On installations that serve uploaded files from the same origin as the...

Ghost: Cross-Site Scripting in Universal Import

Impact The Universal Import feature in Ghost Admin failed to properly sanitize imported content resulting in XSS in post content. Vulnerable versions This vulnerability is present in Ghost from v5.26.0 up to v6.54.0. Patches v6.54.1 contains a fix for this issue. How to update For self-hosters...

Open WebUI: A folder write-collaborator can permanently delete the owner's chats by deleting a shared subfolder

Summary A user granted write access to a shared chat folder could permanently delete chats and messages belonging to the folder's owner. Deleting a folder cascades into the owner's chats and the entire subfolder subtree, and the deletion handler required only write access on subfolders instead of...

Open WebUI: Any authenticated user can stall a worker via a knowledge-search pattern that backtracks catastrophically

Summary The built-in knowledge search tools let a chat participant choose the pattern used to grep knowledge files. Patterns containing regex metacharacters were compiled with Python's backtracking re engine and run against every line of every reachable file, with no time limit anywhere on that...

Open WebUI: Stored XSS via unescaped KaTeX render-error fallback in rendered messages

Summary Any authenticated user can store a chat message whose math block makes KaTeX fail with a stack overflow instead of a parse error. When that happens the renderer falls back to inserting the original math source into the page as HTML rather than as text, so script in the message runs in the...

Open WebUI: Tool source code disclosed to read-only users via the tool list and get endpoints

Summary A workspace tool shared with a read grant returned its full Python source to the recipient. Any authenticated non-admin who could use a shared tool could also read its source, including any user on the instance when a tool was shared publicly. Source is meant to be a writer-only tier: the...

Open WebUI: Unapproved accounts can open terminal sessions via a WebSocket auth path missing the role check

Summary The terminal WebSocket route authenticates its own first-message JWT instead of going through the HTTP dependency chain, and never applies the role check that getverifieduser enforces on every HTTP terminal route. An account whose role is pending, meaning registered but not approved, or...

Open WebUI: Instance-wide stall via automation recurrence rules that force multi-second parsing

Summary In every affected release, automation recurrence parsing anchors minutely and hourly rules at a fixed date of 2000-01-01 and then walks forward one interval at a time to find the next run. A single FREQ=MINUTELY rule therefore enumerates roughly a quarter-century of occurrences,...

Open WebUI: DNS Rebinding SSRF Bypass

Summary Open WebUI vetted user-supplied URLs by resolving the hostname once and rejecting private, loopback and link-local addresses, then let the HTTP client resolve that hostname again at connect time. An attacker who controls the authoritative DNS for a hostname they submit can answer with a...

Open WebUI: Cross-user file content disclosure via request-scoped direct model knowledge metadata

Summary Open WebUI lets a client define a model inline on a chat request instead of selecting a saved workspace model. The knowledge attached to such an inline model was used as-is, without checking that the caller can read what it points at. Any authenticated user who knows another user's file i...

Open WebUI: Deletion of directories and file embeddings in other knowledge bases via sync cleanup

Summary A user with write access to one knowledge base could delete directories, and drop file embeddings, belonging to knowledge bases they do not control. The sync cleanup endpoint verified write access on the knowledge base named in the URL and then acted on the directory and file ids supplied...

Open WebUI: Same-origin XSS to account takeover via terminal file-preview iframe hardcoding allow-same-origin

Summary Any authenticated user with access to a terminal server could get script of their choosing to run in the Open WebUI origin itself. The HTML file preview rendered terminal-served files in an iframe whose sandbox always granted allow-same-origin alongside allow-scripts, and the file is serv...

Open WebUI: Any authenticated user can reach internal services and cloud metadata via NAT64-encoded URLs

Summary Open WebUI fetches user-supplied URLs on the server for RAG URL ingestion, URL-to-markdown conversion and web-search content retrieval, and decides whether a destination is allowed by asking whether its IP address is globally routable. That test operates on the literal IPv6 address and do...

Open WebUI: Users denied the image-generation permission can still generate images via chat completions

Summary An authenticated user whose features.imagegeneration permission has been revoked can still make the server generate images by sending the feature flag in a chat-completion request. The chat pipeline took the client-supplied features object at face value and never re-checked the permission...

Open WebUI: Client-side SSRF via unrestricted external resource loading in Vega/Vega-Lite chart rendering

Summary Open WebUI renders vega and vega-lite fenced code blocks in chat content by building a Vega view in the viewer's browser without a restricted resource loader. Any user who can place such a block where another user will see it can make that user's browser issue attacker-chosen outbound GET...

Open WebUI: Any authenticated user can cancel another user's chat generation via the chat delete endpoint

Summary DELETE /api/v1/chats/id cancelled a chat's in-flight tasks before it checked whether the caller was allowed to delete that chat. Any authenticated user who knew another user's chat id could therefore abort that user's running model response, title generation or tag generation. The deletio...

Open WebUI: Account takeover via OAuth token exchange accepting tokens issued to any client

Summary The OAuth token exchange endpoint accepts a raw provider access token and validates it by calling the provider's userinfo endpoint. A userinfo endpoint reports only that a token is valid, never which OAuth client it was issued to, and the endpoint performed no audience or client check of...

Open WebUI: Any member with write access to a standard channel can edit or delete other members' messages

Summary On standard channels, the message update and delete handlers accepted any caller holding write access on the channel, without checking that the caller wrote the message. Write access is the same grant a member needs in order to post, so every ordinary participant in a shared channel could...

Open WebUI: SSRF into internal services via unvalidated sub-resource requests in the Playwright web loader

Summary With the Playwright web loader enabled, Open WebUI opens user-submitted URLs in a real browser and validates the destination address before allowing the request. That check only ran for the top-level page request. Every other request the page issued was passed through unvalidated, so a pa...

Flowise: Unauthenticated OAuth2 token refresh endpoint returns access tokens — enables token theft for any connected service

Summary The OAuth2 token refresh endpoint POST /api/v1/oauth2-credential/refresh/:credentialId is in WHITELISTURLS, meaning it requires no authentication. It decrypts the stored credential containing clientId, clientSecret, refreshtoken, sends a refresh request to the configured OAuth provider, a...

Flowise: CSV Agent Prompt Injection Remote Code Execution Vulnerability

-- ABSTRACT ------------------------------------- Trend Micro's Zero Day Initiative has identified a vulnerability affecting the following products: Flowise - Flowise -- VULNERABILITY DETAILS ------------------------ Version tested: 3.1.1 Installer file: https://github.com/FlowiseAI/Flowise npm...

Flowise: Broken Access Control in Stripe Subscription Endpoints Allows Cross-Tenant Billing Manipulation

Summary Several organization billing endpoints accept attacker-controlled Stripe identifiers subscriptionId without verifying that the identifier belongs to the authenticated user's organization. This allows an authenticated attacker to perform unauthorized Stripe subscription operations on other...

Flowise: Unauthenticated Credential Abuse via Text-to-Speech Endpoint Allows Unauthorized Use of Private Chatflow TTS Credentials

Summary The /api/v1/text-to-speech/generate endpoint is whitelisted requires no authentication and accepts any chatflowId without checking whether the referenced chatflow is public. An unauthenticated attacker who knows a valid chatflow UUID can abuse that chatflow's TTS credential OpenAI or...

Flowise: Missing Authorization on Execution Update Endpoint

Flowise Security Audit Report Date: 2026-03-17 Researcher: Dimpal Jadhav [email protected] GitHub: https://github.com/Dimpyj1604 Target: FlowiseAI/Flowise latest main branch Version: [email protected] FINDING 1: Missing Authorization on Execution Update Endpoint Severity: HIGH CVSS 7.5...

Flowise: Cross-Workspace OAuth2 Credential Metadata Leak

Summary Three OAuth2 credential endpoints look up credentials by id alone with no workspaceId filter. Two of these endpoints callback, refresh are whitelisted from all authentication. This allows: 1. Cross-workspace credential access — Any authenticated user can initiate OAuth2 flows against...

Flowise: Incomplete Credential Redaction Exposes Secrets via API

Summary The GET /api/v1/credentials/:id endpoint decrypts stored credential data and returns it in the plainDataObj field of the API response. While a redactCredentialWithPasswordType function masks fields defined with type: 'password' in their component schema, many credential types store highly...

Flowise: Information Disclosure in GET /api/v1/upsert-history returns the entire server-wide upsert history

Summary The GET /api/v1/upsert-history endpoint returns the entire server-wide upsert history response size 100MB instead of being scoped to the requesting user/tenant/workspace. The response includes sensitive configuration data e.g., Vector Store settings such as Qdrant Server URL and collectio...

Flowise: Cross-workspace credential IDOR in openai-assistants-vector-store

Summary These endpoints accept a client-controlled credential parameter. The server loads credentials by id and uses them directly, without checking whether that credential belongs to the caller’s workspace. If an attacker knows another workspace’s credentialId, they can use that workspace’s Open...

Flowise: RCE via CSVAgent csvFile data URI base64 segment is interpolated into Python source without validation

Summary Flowise's CSVAgent interpolates an attacker-controlled segment of the csvFile data URI directly into a Python source-code template that is then executed by Pyodide. Because Pyodide is loaded with the default js bridge to globalThis which on Node.js exposes eval and dynamic import, the...

Flowise: Authenticated arbitrary file write in the `S3 Directory` document loader via unsanitized S3 object keys

Summary Flowise on current main allows an authenticated user with documentStores:preview-process permission to trigger the S3 Directory document loader with attacker-controlled S3 object keys. The loader joins each returned S3 key with a temporary directory using path.jointempDir, key and writes...

Flowise: RBAC Bypass Leading to Unauthorized Workspace Variables Disclosure

Finding — Unauthorized Workspace Variables disclosure via $vars injection bypasses variables:view What’s wrong code locations - Variables for the active workspace are fetched without checking “variables:view” at this call site: flowise-src/ packages/components/src/utils.ts:932 - Runtime variables...

Flowise: Pyodide validator Unicode homoglyph bypass leads to RCE

Summary The validatePythonCodeForDataFrame blacklist in packages/components/src/pythonCodeValidator.ts can be bypassed with Unicode homoglyph identifiers, allowing arbitrary Python execution inside Pyodide and full OS command execution on the Flowise host via Pyodide's js module interop. This...

Flowise: CVE-2025-8943 Patch Bypass: npm_config_yes bypasses MCP environment variable blocklist (Unauthenticated RCE)

Summary The mitigation shipped for CVE-2025-8943 blocks the -y and --yes flags on npx to stop auto-installation of arbitrary packages. That flag filter works. The environment-variable check in the same patch denies only four variable names by exact string match, and npm reads its configuration...

Flowise: `DELETE /api/v1/chatflows/:id` does not validate resource type, allowing `agentflows:delete` and `chatflows:delete` to delete each other’s flow type

summary: In Flowise, DELETE /api/v1/chatflows/:id authorizes requests with checkAnyPermission'chatflows:delete,agentflows:delete'. Possession of either permission is sufficient to reach the delete path. The delete logic does not validate the target resource type, allowing a caller with only...

Flowise RCE via SQLite Record Manager Node

============================================================================= Security Advisory elttam Topic: Flowise RCE via SQLite Record Manager Node Module: FlowiseAI/Flowise Disclosed: 24-Apr-2026 Credits: Alex Brown Affects: FlowiseAI/Flowise 3.1.2 I. Background Flowise AI is an open-source...

Flowise: Unauthenticated Property Injection into Flow Execution Context via Ungated `overrideConfig` Spread in Prediction API

Summary The POST /api/v1/prediction/:id endpoint — which is unauthenticated whitelisted in WHITELISTURLS — accepts an overrideConfig object in the request body. This object is unconditionally spread into the internal flowConfig and flowData objects at two locations in the codebase without checkin...

Flowise: SSRF Protection Bypass via IPv4-Mapped IPv6 Addresses

Summary Flowise's HTTP security module httpSecurity.ts fails to normalize IPv4-mapped IPv6 addresses e.g., ::ffff:127.0.0.1, ::ffff:169.254.169.254 before checking them against the deny list. Due to an ipaddr.js kind mismatch ipv6 vs ipv4, all IPv4 CIDR deny rules are silently skipped for...

Flowise: Remote Code Execution Vulnerability in CSVAgent

Summary The CSVAgent node was observed to allow users to write Python code which gets executed via pyodide. The original intent was to allow users to utilise the pandas library for CSV processing. Although there is a denylist that checks for dangerous Python constructs from being passed in, panda...