# CVE-2005-4756: Auth bypass in n/a

> Attackers can gain privileges by exploiting improper validation of derived Principals in WebLogic Server when multiple PrincipalValidators are configured.

- **Severity:** High 7.5 (`AV:N/AC:L/Au:N/C:P/I:P/A:P`)
- **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:** 1 Apr 2006
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-c8mv-2mvj-9jjp

## What is CVE-2005-4756?

CVE-2005-4756 is a high-severity authentication bypass vulnerability in Bea Weblogic Server, published on 1 Apr 2006. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

BEA WebLogic Server and WebLogic Express 8.1 SP4 and earlier, and 7.0 SP5 and earlier, do not properly validate derived Principals with multiple PrincipalValidators, which might allow attackers to gain privileges.

## Which versions are affected by CVE-2005-4756?

It affects 1 product.


Products: Bea Weblogic Server.

## How do I fix CVE-2005-4756?

No fix has been published for CVE-2005-4756 yet. Limit exposure of the affected software until one is available.

## Is CVE-2005-4756 being exploited?

There is no known exploitation of CVE-2005-4756 in the wild and no public exploit code.

## Other vulnerabilities in Bea Weblogic Server

- [CVE-2008-3257](https://insights.sbomify.com/CVE-2008-3257/): Memory corruption in n/a (critical 10.0)
- [CVE-2007-0417](https://insights.sbomify.com/CVE-2007-0417/): BEA WebLogic Server 7.0 through 7.0 SP7, 8.1 through 8.1 SP5, 9.0, and 9.1, when using the WebLogic Server 6.1 compatibility realm, allows a (critical 10.0)
- [CVE-2003-0640](https://insights.sbomify.com/CVE-2003-0640/): Privilege escalation in n/a (critical 10.0)
- [CVE-2001-0098](https://insights.sbomify.com/CVE-2001-0098/): Path traversal in n/a (critical 10.0)
- [CVE-2000-0681](https://insights.sbomify.com/CVE-2000-0681/): Memory corruption in n/a (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2005-4756 and fix it if it is affected.

What it is: CVE-2005-4756 is a high-severity authentication bypass vulnerability in Bea Weblogic Server, published on 1 Apr 2006. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2005-4756 in the wild and no public exploit code.

Affected product: Bea Weblogic Server. 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-2005-4756/ (Markdown: https://insights.sbomify.com/CVE-2005-4756/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2005-4756
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2005-4756
- OSV: https://osv.dev/vulnerability/CVE-2005-4756

---
From sbomify Insights: https://insights.sbomify.com/CVE-2005-4756/
Summaries are generated and may contain mistakes; the official description above is the record.