# CVE-2023-6835: WSO2 API Manager allows attackers to change the API rating

> Attackers can manipulate API ratings in WSO2 products due to missing server-side input validation in the Forum feature.

- **Severity:** Medium 4.3 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/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:** 15 Dec 2023
- **Updated:** 2 Aug 2024
- **Also known as:** GHSA-w7rx-824v-rgx5

## What is CVE-2023-6835?

CVE-2023-6835 is a medium-severity vulnerability in Wso2 Api Manager, published on 15 Dec 2023. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Multiple WSO2 products have been identified as vulnerable due to lack of server-side input validation in the Forum feature, API rating could be manipulated.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2023-6835?

2 open source packages ship an affected version, including org.wso2.carbon.apimgt:forum. It affects 2 products.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `org.wso2.carbon.apimgt:forum` | Maven | All versions to 9.0.78 | None |
| `org.wso2.carbon.apimgt:forum` | Maven | All versions to 9.0.78 | None |

Products: Wso2 Api Manager, Wso2 Iot Server.

## How do I fix CVE-2023-6835?

No fix has been published for CVE-2023-6835 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-6835 being exploited?

There is no known exploitation of CVE-2023-6835 in the wild and no public exploit code.

## Other vulnerabilities in Wso2 Api Manager

- [CVE-2022-29464](https://insights.sbomify.com/CVE-2022-29464/): WSO2 Multiple Products Unrestrictive Upload of File (critical 9.8, exploited in the wild)
- [CVE-2024-6914](https://insights.sbomify.com/CVE-2024-6914/): Incorrect Authorization in Multiple WSO2 Products via Account Recovery SOAP Admin Service Leading to Account Takeover (critical 9.8)
- [CVE-2020-13226](https://insights.sbomify.com/CVE-2020-13226/): WSO2 API Manager vulnerable to SSRF (critical 9.8)
- [CVE-2025-2905](https://insights.sbomify.com/CVE-2025-2905/): An XML External Entity (XXE) vulnerability in Multiple WSO2 Products (critical 9.1)
- [CVE-2021-42646](https://insights.sbomify.com/CVE-2021-42646/): XML external entity in n/a (critical 9.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-6835 and fix it if it is affected.

What it is: CVE-2023-6835 is a medium-severity vulnerability in Wso2 Api Manager, published on 15 Dec 2023. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2023-6835 in the wild and no public exploit code.

Affected packages and fixed versions:
- org.wso2.carbon.apimgt:forum (Maven): affected all versions up to 9.0.78; no fix listed
- org.wso2.carbon.apimgt:forum (Maven): affected all versions up to 9.0.78; no fix listed

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-2023-6835/ (Markdown: https://insights.sbomify.com/CVE-2023-6835/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-6835
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-6835
- OSV: https://osv.dev/vulnerability/CVE-2023-6835

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-6835/
Summaries are generated and may contain mistakes; the official description above is the record.