# CVE-2021-40852: TCMAN GIM open redirect vulnerability

> A remote attacker can redirect users to malicious pages, potentially leading to information disclosure in TCMAN GIM.

- **Severity:** Medium 6.1 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 17 Dec 2021
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-cmxr-2mw4-8jjq

## What is CVE-2021-40852?

CVE-2021-40852 is a medium-severity vulnerability in TCMAN GIM, published on 17 Dec 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

TCMAN GIM is affected by an open redirect vulnerability. This vulnerability allows the redirection of user navigation to pages controlled by the attacker. The exploitation of this vulnerability might allow a remote attacker to obtain information.

Weakness: CWE-601 (URL Redirection to Untrusted Site)

## Which versions are affected by CVE-2021-40852?

It affects 1 product.


Products: Tcman Gim.

## How do I fix CVE-2021-40852?

No fix has been published for CVE-2021-40852 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-40852 being exploited?

There is no known exploitation of CVE-2021-40852 in the wild and no public exploit code.

## Other vulnerabilities in TCMAN GIM

- [CVE-2021-40850](https://insights.sbomify.com/CVE-2021-40850/): TCMAN GIM SQL injection vulnerability (critical 10.0)
- [CVE-2022-36276](https://insights.sbomify.com/CVE-2022-36276/): SQL injection vulnerability in TCMAN GIM (critical 9.9)
- [CVE-2025-40664](https://insights.sbomify.com/CVE-2025-40664/): Missing authentication vulnerability in TCMAN GIM v11 (critical 9.3)
- [CVE-2025-40620](https://insights.sbomify.com/CVE-2025-40620/): Multiple vulnerabilities in TCMAN's GIM (critical 9.3)
- [CVE-2025-40621](https://insights.sbomify.com/CVE-2025-40621/): Multiple vulnerabilities in TCMAN's GIM (critical 9.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-40852 and fix it if it is affected.

What it is: CVE-2021-40852 is a medium-severity vulnerability in TCMAN GIM, published on 17 Dec 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2021-40852 in the wild and no public exploit code.

Affected product: TCMAN GIM. 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-2021-40852/ (Markdown: https://insights.sbomify.com/CVE-2021-40852/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-40852
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-40852
- OSV: https://osv.dev/vulnerability/CVE-2021-40852

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-40852/
Summaries are generated and may contain mistakes; the official description above is the record.