# CVE-2018-2691: Missing authorization in User Management

> Low-privileged attackers can exploit Proxy User Delegation flaws to read and modify Oracle User Management data via HTTP.

- **Severity:** Medium 5.4 (`CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A: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:** 18 Jan 2018
- **Updated:** 3 Oct 2024
- **Also known as:** GHSA-fp6w-4wgr-rpq7

## What is CVE-2018-2691?

CVE-2018-2691 is a medium-severity missing authorization vulnerability in Oracle Corporation User Management, published on 18 Jan 2018. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Vulnerability in the Oracle User Management component of Oracle E-Business Suite (subcomponent: Proxy User Delegation). Supported versions that are affected are 12.1.3, 12.2.3, 12.2.4, 12.2.5, 12.2.6 and 12.2.7. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Oracle User Management. Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of Oracle User Management accessible data as well as unauthorized read access to a subset of Oracle User Management accessible data. CVSS 3.0 Base Score 5.4 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N).

## Which versions are affected by CVE-2018-2691?

It affects 1 product.


Products: Oracle User Management.

## How do I fix CVE-2018-2691?

No fix has been published for CVE-2018-2691 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-2691 being exploited?

There is no known exploitation of CVE-2018-2691 in the wild and no public exploit code.

## Other vulnerabilities in Oracle Corporation User Management

- [CVE-2025-30708](https://insights.sbomify.com/CVE-2025-30708/): Information disclosure in Oracle User Management (high 7.5)
- [CVE-2018-3236](https://insights.sbomify.com/CVE-2018-3236/): Missing authorization in User Management (medium 6.5)
- [CVE-2023-21997](https://insights.sbomify.com/CVE-2023-21997/): Information disclosure in User Management (medium 4.3)
- [CVE-2026-22014](https://insights.sbomify.com/CVE-2026-22014/): Missing authorization in Oracle User Management (low 3.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-2691 and fix it if it is affected.

What it is: CVE-2018-2691 is a medium-severity missing authorization vulnerability in Oracle Corporation User Management, published on 18 Jan 2018. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2018-2691 in the wild and no public exploit code.

Affected product: Oracle Corporation User 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-2018-2691/ (Markdown: https://insights.sbomify.com/CVE-2018-2691/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-2691
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-2691
- OSV: https://osv.dev/vulnerability/CVE-2018-2691

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-2691/
Summaries are generated and may contain mistakes; the official description above is the record.