# CVE-2016-8309: Missing authorization in FLEXCUBE Investor Servicing

> Low-privileged attackers can gain unauthorized read access to data in Oracle FLEXCUBE Investor Servicing via HTTP.

- **Severity:** Medium 4.3 (`CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/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:** 27 Jan 2017
- **Updated:** 9 Oct 2024
- **Also known as:** GHSA-6g28-v6jr-4f5j

## What is CVE-2016-8309?

CVE-2016-8309 is a medium-severity missing authorization vulnerability in Oracle FLEXCUBE Investor Servicing, published on 27 Jan 2017. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Vulnerability in the Oracle FLEXCUBE Investor Servicing component of Oracle Financial Services Applications (subcomponent: Core). Supported versions that are affected are 12.0.1, 12.0.2,12.0.4,12.1.0 and 12.3.0. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Oracle FLEXCUBE Investor Servicing. Successful attacks of this vulnerability can result in unauthorized read access to a subset of Oracle FLEXCUBE Investor Servicing accessible data. CVSS v3.0 Base Score 4.3 (Confidentiality impacts).

Weakness: CWE-284 (Improper Access Control)

## Which versions are affected by CVE-2016-8309?

It affects 1 product.


Products: Oracle Flexcube Investor Servicing.

## How do I fix CVE-2016-8309?

No fix has been published for CVE-2016-8309 yet. Limit exposure of the affected software until one is available.

## Is CVE-2016-8309 being exploited?

There is no known exploitation of CVE-2016-8309 in the wild and no public exploit code.

## Other vulnerabilities in Oracle FLEXCUBE Investor Servicing

- [CVE-2026-21973](https://insights.sbomify.com/CVE-2026-21973/): Missing authorization in Oracle FLEXCUBE Investor Servicing (high 8.1)
- [CVE-2020-14569](https://insights.sbomify.com/CVE-2020-14569/): Missing authorization in FLEXCUBE Investor Servicing (high 8.1)
- [CVE-2019-2841](https://insights.sbomify.com/CVE-2019-2841/): Missing authorization in FLEXCUBE Investor Servicing (high 8.1)
- [CVE-2018-3035](https://insights.sbomify.com/CVE-2018-3035/): Missing authorization in FLEXCUBE Investor Servicing (high 8.1)
- [CVE-2016-8315](https://insights.sbomify.com/CVE-2016-8315/): Missing authorization in FLEXCUBE Investor Servicing (high 8.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2016-8309 and fix it if it is affected.

What it is: CVE-2016-8309 is a medium-severity missing authorization vulnerability in Oracle FLEXCUBE Investor Servicing, published on 27 Jan 2017. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2016-8309 in the wild and no public exploit code.

Affected product: Oracle FLEXCUBE Investor Servicing. 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-2016-8309/ (Markdown: https://insights.sbomify.com/CVE-2016-8309/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2016-8309
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2016-8309
- OSV: https://osv.dev/vulnerability/CVE-2016-8309

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From sbomify Insights: https://insights.sbomify.com/CVE-2016-8309/
Summaries are generated and may contain mistakes; the official description above is the record.