Open-Xchange GmbH · OX App Suite Security Advisory OXAS-ADV-2025-0002
Affects Open-Xchange GmbHSource GCVE Database
Not known to be exploited · CVSS 5.4 Medium.
Data as of 29 Oct 2026, 23:20 UTC
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:NExploitation evidence
Disclosed: evidence found.
CVE published 31 Oct 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Open-Xchange GmbH Open-Xchange GmbH | Affected
| Fixed in– |
AI-suggested
Users of the affected versions should monitor Open-Xchange GmbH communications for updates and apply security best practices regarding email content handling. Since no cloud service is involved, remediation depends on vendor updates.
Description
A vulnerability in Open-Xchange GmbH's OX App Suite allows malicious email content to perform a redressing attack. This security advisory identifies the issue affecting specific versions 7.6.3-rev77 and 8.35.111. The vulnerability is classified as high severity due to the potential impact of such an attack.
References
- documentation.open-xchange.com/appsuite/security/advisories/csaf/2025/oxas-adv-2025-0002.json (opens in a new tab)
- documentation.open-xchange.com/appsuite/security/advisories/md/2025/oxas-adv-2025-0002.md (opens in a new tab)
- documentation.open-xchange.com/appsuite/security/advisories/html/2025/oxas-adv-2025-0002.html (opens in a new tab)
- documentation.open-xchange.com/appsuite/security/advisories/txt/2025/oxas-adv-2025-0002.txt (opens in a new tab)