# CVE-2021-35966: Learningdigital.com, Inc. Orca HCM - URL Redirection to Untrusted Site ('Open Redirect')

> Attackers can redirect users to malicious sites via unfiltered parameters, facilitating phishing attacks against Orca HCM users.

- **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:** 19 Jul 2021
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-3cvx-wrcf-56r2

## What is CVE-2021-35966?

CVE-2021-35966 is a medium-severity vulnerability in Learningdigital.com, Inc. Orca HCM, published on 19 Jul 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

The specific function of the Orca HCM digital learning platform does not filter input parameters properly, which causing the URL can be redirected to any website. Remote attackers can use the vulnerability to execute phishing attacks.

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

## Which versions are affected by CVE-2021-35966?

It affects 1 product.


Products: Learningdigital Orca Hcm.

## How do I fix CVE-2021-35966?

No fix has been published for CVE-2021-35966 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-35966 being exploited?

There is no known exploitation of CVE-2021-35966 in the wild and no public exploit code.

## Other vulnerabilities in Learningdigital.com, Inc. Orca HCM

- [CVE-2025-1387](https://insights.sbomify.com/CVE-2025-1387/): Learning Digital Orca HCM - Improper Authentication (critical 9.8)
- [CVE-2024-8584](https://insights.sbomify.com/CVE-2024-8584/): LEARNING DIGITAL Orca HCM - Missing Authentication (critical 9.8)
- [CVE-2021-35963](https://insights.sbomify.com/CVE-2021-35963/): Learningdigital.com, Inc. Orca HCM - Unrestricted Upload of File with Dangerous Type (critical 9.8)
- [CVE-2021-35965](https://insights.sbomify.com/CVE-2021-35965/): Learningdigital.com, Inc. Orca HCM - Hard-code password (critical 9.8)
- [CVE-2025-1388](https://insights.sbomify.com/CVE-2025-1388/): Learning Digital Orca HCM - Arbitrary File Upload (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-35966 and fix it if it is affected.

What it is: CVE-2021-35966 is a medium-severity vulnerability in Learningdigital.com, Inc. Orca HCM, published on 19 Jul 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-2021-35966 in the wild and no public exploit code.

Affected product: Learningdigital.com, Inc. Orca HCM. 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-2021-35966/ (Markdown: https://insights.sbomify.com/CVE-2021-35966/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-35966
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-35966
- OSV: https://osv.dev/vulnerability/CVE-2021-35966

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From sbomify Insights: https://insights.sbomify.com/CVE-2021-35966/
Summaries are generated and may contain mistakes; the official description above is the record.