{"data":{"id":"741bdf3f-703c-4185-806c-07bc15bcd97c","title":"GHSA-59fh-9f3p-7m39: Flowise: Mass Assignment in PUT /api/v1/user Allows Authenticated Users to Override Password Hash and Bypass Password Change Verification","summary":"GHSA-59fh-9f3p-7m39 is a mass assignment flaw in Flowise's PUT /api/v1/user endpoint. The controller forwards the whole request body to userService.updateUser, which merges it into the User entity without a field allowlist. An authenticated user can therefore overwrite the credential field with a chosen bcrypt hash, bypassing old password verification, hashing and policy checks, and session invalidation. The source notes an attacker holding a temporary session, for example via XSS or token theft, could use this for persistent account access, though the ID check prevents changing other users' accounts.","solution":"N/A -- no mitigation discussed in source.","labels":["security"],"sourceUrl":"https://github.com/advisories/GHSA-59fh-9f3p-7m39","publishedAt":"2026-05-20T15:44:40.000Z","cveId":null,"cweIds":null,"cvssScore":null,"cvssSeverity":"medium","severity":"medium","attackType":["other"],"issueType":"vulnerability","affectedPackages":["flowise@<= 3.1.1 (fixed: 3.1.2)"],"affectedPackageNames":["flowise"],"affectedPackageRefs":["npm:flowise"],"affectedVendors":[],"affectedVendorsRaw":["Flowise"],"classifierModel":"claude-haiku-5-5","classifierPromptVersion":"v4","summaryPromptVersion":"v2","headline":null,"headlinePromptVersion":null,"cvssVector":null,"attackVector":null,"attackComplexity":null,"privilegesRequired":null,"userInteraction":null,"exploitMaturity":null,"epssScore":null,"epssCheckedAt":null,"kevDateAdded":null,"advisoryAliases":["GHSA-59fh-9f3p-7m39"],"affectedPackagesSource":null,"affectedPackagesCheckedAt":null,"patchAvailable":true,"disclosureDate":"2026-05-20T15:44:40.000Z","capecIds":null,"crossRefCount":0,"attackSophistication":"trivial","impactType":["confidentiality","integrity"],"aiComponentTargeted":"framework","llmSpecific":false,"classifierConfidence":0.85,"researchCategory":null,"atlasIds":null}}