Vulnerabilidad · Publicado 10/09/2026
Existe una vulnerabilidad de bypass de autorización en el componente DBViewer de Countly Server que permite a atacantes eludir controles de acceso mediante manipulación de JSON en el endpoint /o/db. El fallo reside en la detección deficiente de sub-pipelines en el sanitizador de etapas de agregación. Empresas en LATAM que usan Countly para analytics están expuestas a acceso no autorizado a bases de datos sensibles (CVSS 7.1).
An authorization bypass vulnerability exists in the Countly Server DBViewer due to flawed sub-pipeline detection in the aggregation stage sanitizer. The /o/db aggregation endpoint parses user-controlled aggregation JSON and passes it through a stage sanitizer that determines whether a nested array is a sub-pipeline by checking if every element contains a key present in a hardcoded KNOWN_STAGE_OPERATORS set. If any element contains an unrecognized stage key, such as the undocumented MongoDB-internal $_internalInhibitOptimization, the sanitizer misclassifies the entire branch as a generic array and skips stage-level stripping for all sibling stages. This allows a non-admin user with DBViewer read permission to inject forbidden operators like $lookup inside $facet sub-pipelines, performing cross-collection joins into restricted collections. This leads to unauthorized read access to sensitive data including password-reset tokens (prid), enabling account takeover.
Score: 7.1/10 — Severidad: HIGH — Estado NIST: Received
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
CWE-863
Publicado en NIST NVD.