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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.

PUBLISHED Reserved 2026-03-31 | Published 2026-04-08 | Updated 2026-04-09 | Assigner VulnCheck




MEDIUM: 5.3CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

MEDIUM: 4.3CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Problem types

CWE-639 Authorization Bypass Through User-Controlled Key

Product status

Default status
unaffected

Any version before 8.2.0
affected

Credits

Noa Tchoumak finder

VulnCheck coordinator

References

www.wimi-teamwork.com/en/product-update release-notes patch

www.vulncheck.com/...amwork-on-premises-idor-via-preview-php third-party-advisory

cve.org (CVE-2026-35023)

nvd.nist.gov (CVE-2026-35023)

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