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CSRF on TARGET through /users/:id via POST parameter "user[admin]"

High
oliverguenther published GHSA-6crw-7f5r-4qj9 Jun 8, 2026

Software

OpenProject

Affected versions

< 17.3.3

Patched versions

17.3.3, 17.4.1

Description

Turbo Drive auto-injects CSRF tokens (from <meta name="csrf-token">) on forms injected via the XSS's append Turbo Stream action. A second action, dispatch_event with name="submit", auto-submits the form with no victim interaction beyond viewing the work package, resulting in a CSRF attack

Credits

This vulnerability was reported as part of the YesWeHack.com OpenProject Bug Bounty program, sponsored by the European Commission.

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVE ID

CVE-2026-52784

Weaknesses

No CWEs