CVE intelligence and bounded remediation

CVE-2019-19866 — Atos Unify Openscape Uc Web Client security vulnerability

High CVSS 7.5

Atos Unify OpenScape UC Web Client V9 before version V9 R4.31.0 and V10 before version V10 R0.6.0 allows remote attackers to obtain sensitive information. By iterating the value of conferenceId to getMailFunction in the JSON API, one can enumerate all conferences scheduled on the platform, with their numbers and access PINs.

Severity
High
CVSS
7.5 (3.1)
Published
2020-02-21
CISA KEV
Not currently listed
Ecosystem
software/application
Weaknesses
CWE-639

Affected products

  • atos / unify_openscape_uc_web_client / 9.0
  • atos / unify_openscape_uc_web_client / 10.0

Matched remediation archetype

Authorization bypass, IDOR, and cross-tenant access

This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.

Check exposure

  • Map object and action authorization checks across API, UI, batch, import/export, and background-job paths.
  • Identify tenant, ownership, role, and policy boundaries for affected resources and administrative operations.
  • Use synthetic fixtures to compare intended access matrices without accessing another user's real data.

Remediate safely

  • Enforce server-side authorization at each resource access and state transition using the authenticated principal and trusted tenant context.
  • Scope data queries by tenant and ownership; treat client-supplied identifiers, roles, and policy claims as untrusted.
  • Add deny-by-default policy tests for horizontal and vertical access across every affected transport.

Authoritative sources

Complete CVE record and remediation plan

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