CVE-2021-42192: Konga v0.14.9 is affected by an incorrect access control vulnerability where a specially crafted request can lead to privilege escalation.

PriorityP267high8.8CVSS 3.1

AVNACLPRLUINSUCHIHAH

EXPLOIT

EPSS

9.92%

95.0th percentile

Konga v0.14.9 is affected by an incorrect access control vulnerability where a specially crafted request can lead to privilege escalation.

Affected

1 ranges

Vendor	Product	Version range	Fixed in
konga_project	konga	—	—

Detection & IOCsextracted from sources · hover to see the quote

url/api/user/{ID}↗

path/api/user/{{id}}

commandPUT /api/user/{{id}} with body {"admin": "true", "passports": {"password": "{{password}}", "protocol": "local"}, "token": "{{token}}", "password_confirmation": "{{password}}"}

→Successful exploitation is confirmed when the response to the PUT /api/user/{id} request contains "admin":true (changed from "admin":false in the prior GET/POST response), indicating the privilege escalation succeeded.
→Monitor for a sequence of 3 requests: POST /login (credential submission), POST /api/user/{id} (token retrieval), then PUT /api/user/{id} (admin flag set to true) — all returning HTTP 200 with Content-Type: application/json.

·The exploit requires valid (low-privilege) credentials to first authenticate via POST /login and obtain a session token before attempting privilege escalation — unauthenticated exploitation is not possible.
·The vulnerability is specific to KONGA version 0.14.9; other versions are not confirmed affected by the sources. ↗

CVSS provenance

nvdv3.18.8HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

nvdv2.09.0CRITICALAV:N/AC:L/Au:S/C:C/I:C/A:C

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