CVE-2021-27772 HCL Sametime is vulnerable to an information disclosure

High 7.1 Published 12 May 2022 Updated 17 Sep 2024

Attackers can read private group conversation contents without being members, leading to unauthorized information disclosure in HCL Sametime.

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-2021-27772?

CVE-2021-27772 is a high-severity missing authorization vulnerability in HCL Software Sametime, published on 12 May 2022. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

Users are able to read group conversations without actively taking part in them. Next to one to one conversations, users are able to start group conversations with multiple users. It was found possible to obtain the contents of these group conversations without being part of it. This could lead to information leakage where confidential information discussed in private groups is read by other users without the users knowledge.

Weakness: CWE-285

Which versions are affected by CVE-2021-27772?

It affects 1 product.

Products include Hcltech Sametime.

How do I fix CVE-2021-27772?

No fix has been published for CVE-2021-27772 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-2021-27772 being exploited?

There is no known exploitation of CVE-2021-27772 in the wild and no public exploit code.

Sources

Also known as GHSA-67g3-hq78-3fjw.