CVE-2025-56449

Estado: AplazadaAlta (8.2)—

A security vulnerability was identified in Obsidian Scheduler's REST API 5.0.0 thru 6.3.0. If an account is locked out due to not enrolling in MFA (e.g. after the 7-day enforcement window), the REST API still allows the use of Basic Authentication to authenticate and perform administrative actions. In particular, the default admin account was found to be locked out via the web interface but still usable through the REST API. This allowed creation of a new privileged user, bypassing MFA protections. This undermines the intended security posture of MFA enforcement.

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
Puntuación base: 8.2

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.38%
Percentil entre todas las CVEs puntuadas: 29
Fecha de la puntuación: 6/10/2026

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

ExplotaciónT1190 Exploit Public-Facing Applicationinitial access85 %
Impacto principalT1078 Valid Accountsstealth · persistence · privilege escalation · initial access90 %
Impacto secundarioT1098 Account Manipulationpersistence · privilege escalation75 %
Impacto secundarioT1136 Create Accountpersistence70 %

REST API abierta (AV:N, PR:N, UI:N) permite autenticación básica sin MFA. Atacante obtiene acceso de cuenta admin y crea usuarios privilegiados, eludiendo enforcement de MFA (CWE-290: improper authentication).

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Privileged Account Management Network Segmentation Multi-factor Authentication User Account Management Operating System Configuration Application Developer Guidance

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Obsidian — Scheduler^AI

CWE

CWE-290

Referencias

JSON original (NVD)

Mostrar

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          "role": "CISA Coordinator",
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          "version": "2.0.3",
          "timestamp": "2025-09-29T15:40:09.687082Z"
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          "integrityImpact": "LOW",
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          "privilegesRequired": "NONE",
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  "published": "2025-09-29T15:16:08.653",
  "references": [
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      "url": "https://blog.gregscharf.com/2025/07/11/upcoming-vulnerability-advisory/",
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      "value": "A security vulnerability was identified in Obsidian Scheduler's REST API 5.0.0 thru 6.3.0. If an account is locked out due to not enrolling in MFA (e.g. after the 7-day enforcement window), the REST API still allows the use of Basic Authentication to authenticate and perform administrative actions. In particular, the default admin account was found to be locked out via the web interface but still usable through the REST API. This allowed creation of a new privileged user, bypassing MFA protections. This undermines the intended security posture of MFA enforcement."
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  "lastModified": "2026-06-17T09:42:37.087",
  "sourceIdentifier": "cve@mitre.org"
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