CVE-2023-26446: Open-Xchange Appsuite Frontend

Medium severity, CVSS 5.4. EPSS: 0.7% chance of exploitation in the next 30 days.

The users clientID at "application passwords" was not sanitized or escaped before being added to DOM. Malicious script code can be executed within the victims context. This can lead to session hijacking or triggering unwanted actions via the web interface and API. To exploit this an attacker would require temporary access to the users account or lure a user to a compromised account. We now sanitize the user-controllable clientID parameter. No publicly available exploits are known.

Affected products

• Open-Xchange Open-Xchange Appsuite Frontend: up to and including 7.10.6; from 8.10, before 8.12 (fixed in 8.12)

Published 2023-08-02. Last modified 2026-06-17.