CVE-2026-35023: Wimi Teamwork On-Premises < 8.2.0 IDOR via preview.php

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-04-08 · updated 2026-07-24
Weakness: CWE-639

Description

Wimi Teamwork On-Premises versions prior to 8.2.0 contain an insecure direct object reference vulnerability in the preview.php endpoint where the item_id parameter lacks proper authorization checks. Attackers can enumerate sequential item_id values to access and retrieve image previews from other users' private or group conversations, resulting in unauthorized disclosure of sensitive information.

Affected products

Cloud Solutions SAS Wimi Teamwork: before 8.2.0 — fixed in 8.2.0

How to fix

Upgrade to a fixed version: Cloud Solutions SAS Wimi Teamwork 8.2.0. Check the vendor advisory for mitigations.

References

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