Auth bypass in Open-Xchange Appsuite
CVE-2023-26455
RMI was not requiring authentication when calling ChronosRMIService:setEventOrganizer. Attackers with local or adjacent network access could abuse the RMI service to modify calendar items using RMI. RMI access is restricted to localhost by default. The interface has been updated to require authenticated requests. No publicly available exploits are known.
Vulnerability class: Broken Authentication
EPSS: 0.002 (8.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.6 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:L.
Affected products
- Open-xchange Open-xchange_appsuite — versions 7.10.6
- Ox Software Gmbh App Suite — versions 0
Weakness classification (CWE)
References
- security@open-xchange.com (release-notes, Release Notes, Vendor Advisory)
- security@open-xchange.com (vendor-advisory)
Frequently asked questions
- What is CVE-2023-26455?
- CVE-2023-26455 is a medium-severity vulnerability in Open-Xchange Appsuite, classified under Improper Authentication. CVSS score: 5.6/10. Published 2023-11-02.
- How severe is CVE-2023-26455?
- Medium severity. CVSS v3 base score is 5.6 out of 10.