CVE-2023-26455 Missing authorization in OX App Suite

What is CVE-2023-26455?

CVE-2023-26455 is a medium-severity missing authorization vulnerability in Open-Xchange Open-Xchange Appsuite, published on 2 Nov 2023. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

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.

Weakness: CWE-287

Which versions are affected by CVE-2023-26455?

It affects 1 product.

Products include Open-Xchange Open-Xchange Appsuite.

How do I fix CVE-2023-26455?

No fix has been published for CVE-2023-26455 yet. Limit exposure of the affected software until one is available.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2023-26455 being exploited?

There is no known exploitation of CVE-2023-26455 in the wild and no public exploit code.

Other vulnerabilities in Open-Xchange Open-Xchange Appsuite

• CVE-2017-13667 Server-side request forgery in n/a Critical 9.9
• CVE-2020-12645 Denial of service in n/a Critical 9.8
• CVE-2019-7158 Missing authorization in n/a Critical 9.8
• CVE-2017-17060 Misconfiguration in n/a Critical 9.8
• CVE-2017-5210 Information disclosure in n/a Critical 9.8

All Open-Xchange Open-Xchange Appsuite vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-9wv2-mrrp-v8g7.