CVE-2023-26428 Missing authorization in OX App Suite

Medium 6.5 Published 20 Jun 2023 Updated 2 Aug 2024

Attackers can read other users' email signatures by requesting arbitrary snippet IDs due to missing authorization checks in OX App Suite.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2023-26428?

CVE-2023-26428 is a medium-severity missing authorization vulnerability in OX App Suite, published on 20 Jun 2023. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

Attackers can successfully request arbitrary snippet IDs, including E-Mail signatures of other users within the same context. Signatures of other users could be read even though they are not explicitly shared. We improved permission handling when requesting snippets that are not explicitly shared with other users. No publicly available exploits are known.

Weakness: CWE-639

Which versions are affected by CVE-2023-26428?

It affects 1 product.

Products include Open-Xchange Open-Xchange Appsuite Backend.

How do I fix CVE-2023-26428?

No fix has been published for CVE-2023-26428 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-2023-26428 being exploited?

There is no known exploitation of CVE-2023-26428 in the wild and no public exploit code.

Sources

Also known as GHSA-qv8q-wwpq-485r.