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CVE-2026-93556 – Unauthenticated Password Reset via IDOR – Kompini Tankuam Places (versions before N

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Summary

CVE-2026-93556 is a critical Insecure Direct Object Reference (IDOR) vulnerability in Kompini’s Tankuam Places platform, a municipal facilities management system. The flaw allows an unauthenticated attacker to reset the password of any account, including administrative accounts, by manipulating a user-controlled identifier in a password-recovery request. The issue is rated CRITICAL with a CVSS score of 9.3.

Technical details

  • Root cause: the password-recovery endpoint /password/guardarClau/recover accepts a usuariId parameter that specifies which account’s password is being reset, but the JWT token submitted with the request is not validated against that specified user ID.
  • Trigger condition: an attacker simply submits a recovery request with an arbitrary usuariId value; because the token-to-user binding is never checked, the server processes the reset for the targeted account regardless of who holds the token.
  • Attack vector: Network — the endpoint is reachable without authentication and requires no user interaction.
  • Impact: full account takeover, including administrative accounts, since the attacker can set a new password for any user of their choosing.
  • Classified under CWE-639 (Authorization Bypass Through User-Controlled Key).

Affected software

  • Kompini Tankuam Places — all versions published prior to November 25, 2025.

Severity

  • CVSS v4.0 Base Score: 9.3 (Critical)
  • Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Mitigation and recommended actions

  • Immediate: Upgrade to the Kompini Tankuam Places release published on or after November 25, 2025, which contains the vendor’s fix.
  • If immediate patching is not possible: restrict external network access to the password-recovery endpoint, monitor for anomalous password-reset requests specifying arbitrary usuariId values, and force a password reset/re-authentication for all accounts, particularly administrative ones, until the patch is applied.

References

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