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

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

- **Severity:** High 7.1 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 12 May 2022
- **Updated:** 17 Sep 2024
- **Also known as:** GHSA-67g3-hq78-3fjw

## 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 (Improper Authorization)

## Which versions are affected by CVE-2021-27772?

It affects 1 product.


Products: 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.

## Is CVE-2021-27772 being exploited?

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

## Other vulnerabilities in HCL Software Sametime

- [CVE-2021-27771](https://insights.sbomify.com/CVE-2021-27771/): HCL Sametime is susceptible a file transfer service vulnerability (high 8.2)
- [CVE-2021-27770](https://insights.sbomify.com/CVE-2021-27770/): HCL Sametime is vulnerable to arbitrary HTTP requests (medium 6.8)
- [CVE-2022-42446](https://insights.sbomify.com/CVE-2022-42446/): HCL Sametime 12.0 and 12.0FP1 anonymous users have directory lookup access (medium 6.5)
- [CVE-2023-50349](https://insights.sbomify.com/CVE-2023-50349/): HCL Sametime is impacted by a Cross Site Request Forgery (CSRF) vulnerability (medium 5.9)
- [CVE-2024-30122](https://insights.sbomify.com/CVE-2024-30122/): HCL Sametime is impacted by misconfigured security related HTTP headers (medium 5.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-27772 and fix it if it is affected.

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

Affected product: HCL Software Sametime. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2021-27772/ (Markdown: https://insights.sbomify.com/CVE-2021-27772/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-27772
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-27772
- OSV: https://osv.dev/vulnerability/CVE-2021-27772

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-27772/
Summaries are generated and may contain mistakes; the official description above is the record.