# CVE-2021-47721: Orangescrum 1.8.0 Authenticated Privilege Escalation via User Session Manipulation

> Authenticated users can hijack other accounts by manipulating session cookies, leading to unauthorized access and privilege escalation in Orangescrum.

- **Severity:** High 8.7 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **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:** 23 Dec 2025
- **Updated:** 5 Mar 2026
- **Also known as:** GHSA-r5c3-xjh9-7vcw

## What is CVE-2021-47721?

CVE-2021-47721 is a high-severity authentication bypass vulnerability in orangescrum, published on 23 Dec 2025. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Orangescrum 1.8.0 contains a privilege escalation vulnerability that allows authenticated users to take over other project-assigned accounts by manipulating session cookies. Attackers can extract the victim's unique ID from the page source and replace their own session cookie to gain unauthorized access to another user's account.

Weakness: CWE-639 (Authorization Bypass Through User-Controlled Key)

## Which versions are affected by CVE-2021-47721?

It affects 1 product.


Products: Orangescrum Orangescrum.

## How do I fix CVE-2021-47721?

No fix has been published for CVE-2021-47721 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-47721 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-47721 exists.

## Other vulnerabilities in orangescrum

- [CVE-2023-0164](https://insights.sbomify.com/CVE-2023-0164/): Command injection in OrangeScrum (high 8.8)
- [CVE-2021-47720](https://insights.sbomify.com/CVE-2021-47720/): Orangescrum 1.8.0 Authenticated SQL Injection via Multiple Parameters (high 8.7)
- [CVE-2023-0454](https://insights.sbomify.com/CVE-2023-0454/): Path traversal in OrangeScrum (high 8.1)
- [CVE-2023-1783](https://insights.sbomify.com/CVE-2023-1783/): OrangeScrum 2.0.11 - AWS Credentials Leak via PDF Rendering (medium 6.5)
- [CVE-2023-0738](https://insights.sbomify.com/CVE-2023-0738/): Cross-site scripting in OrangeScrum (medium 6.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-47721 and fix it if it is affected.

What it is: CVE-2021-47721 is a high-severity authentication bypass vulnerability in orangescrum, published on 23 Dec 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-47721 exists.

Affected product: orangescrum. 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-2021-47721/ (Markdown: https://insights.sbomify.com/CVE-2021-47721/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-47721
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-47721
- OSV: https://osv.dev/vulnerability/CVE-2021-47721

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-47721/
Summaries are generated and may contain mistakes; the official description above is the record.