# CVE-2021-27783: HCL BigFix Mobile / Modern Client Management is vulnerable to sensitive information exposure

> Attackers can access unencrypted sensitive information from user-generated PPKG files used for bulk enrollment in HCL BigFix Mobile.

- **Severity:** Medium 6.8 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 25 May 2022
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-g59m-qj5c-h6r8

## What is CVE-2021-27783?

CVE-2021-27783 is a medium-severity vulnerability in HCL BigFix Mobile / Modern Client Management, published on 25 May 2022. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

User generated PPKG file for Bulk Enroll may have unencrypted sensitive information exposed.

Weakness: CWE-311 (Missing Encryption of Sensitive Data)

## Which versions are affected by CVE-2021-27783?

It affects 2 products.


Products: Hcltech Bigfix Mobile, Hcltech Bigfix Modern Client Management.

## How do I fix CVE-2021-27783?

No fix has been published for CVE-2021-27783 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-27783 being exploited?

There is no known exploitation of CVE-2021-27783 in the wild and no public exploit code.

## Other vulnerabilities in HCL BigFix Mobile / Modern Client Management

- [CVE-2023-28014](https://insights.sbomify.com/CVE-2023-28014/): HCL BigFix Mobile can be affected by a cross-site scripting (XSS) vulnerability (medium 6.6)
- [CVE-2021-27781](https://insights.sbomify.com/CVE-2021-27781/): HCL BigFix Mobile / Modern Client Management is vulnerable to stored cross-site scripting (medium 6.6)
- [CVE-2025-0276](https://insights.sbomify.com/CVE-2025-0276/): HCL BigFix Modern Client Management (MCM) is affected by an insecure Content Security Policy (CSP) (medium 6.5)
- [CVE-2025-0277](https://insights.sbomify.com/CVE-2025-0277/): HCL BigFix Mobile is affected by an insecure Content Security Policy (CSP) (medium 6.5)
- [CVE-2023-28012](https://insights.sbomify.com/CVE-2023-28012/): HCL BigFix Mobile can be affected by a command injection vulnerability (medium 5.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-27783 and fix it if it is affected.

What it is: CVE-2021-27783 is a medium-severity vulnerability in HCL BigFix Mobile / Modern Client Management, published on 25 May 2022. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2021-27783 in the wild and no public exploit code.

Affected product: HCL BigFix Mobile / Modern Client Management. 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-2021-27783/ (Markdown: https://insights.sbomify.com/CVE-2021-27783/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-27783
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-27783
- OSV: https://osv.dev/vulnerability/CVE-2021-27783

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-27783/
Summaries are generated and may contain mistakes; the official description above is the record.