# CVE-2011-1128: Auth bypass in n/a

> Remote attackers can bypass login restrictions via brute-force attacks to gain unauthorized access or cause denial of service in Simple Machines Forum.

- **Severity:** High 7.5 (`AV:N/AC:L/Au:N/C:P/I:P/A:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 21 Jun 2011
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-gw9p-924j-qxp9

## What is CVE-2011-1128?

CVE-2011-1128 is a high-severity authentication bypass vulnerability in n/a, published on 21 Jun 2011. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The loadUserSettings function in Load.php in Simple Machines Forum (SMF) before 1.1.13, and 2.x before 2.0 RC5, does not properly handle invalid login attempts, which might make it easier for remote attackers to obtain access or cause a denial of service via a brute-force attack.

Weakness: CWE-310

## Which versions are affected by CVE-2011-1128?

It affects 1 product.


Products: Simplemachines Smf.

## How do I fix CVE-2011-1128?

No fix has been published for CVE-2011-1128 yet. Limit exposure of the affected software until one is available.

## Is CVE-2011-1128 being exploited?

There is no known exploitation of CVE-2011-1128 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2011-1127](https://insights.sbomify.com/CVE-2011-1127/): Missing authorization in n/a (critical 10.0)
- [CVE-2011-3615](https://insights.sbomify.com/CVE-2011-3615/): SQL injection in n/a (high 7.5)
- [CVE-2011-1130](https://insights.sbomify.com/CVE-2011-1130/): SQL injection in n/a (high 7.5)
- [CVE-2008-6971](https://insights.sbomify.com/CVE-2008-6971/): Weak cryptography in n/a (high 7.5)
- [CVE-2011-4173](https://insights.sbomify.com/CVE-2011-4173/): Cross-site request forgery in n/a (medium 6.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2011-1128 and fix it if it is affected.

What it is: CVE-2011-1128 is a high-severity authentication bypass vulnerability in n/a, published on 21 Jun 2011. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2011-1128 in the wild and no public exploit code.

Affected product: n/a. 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-2011-1128/ (Markdown: https://insights.sbomify.com/CVE-2011-1128/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2011-1128
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2011-1128
- OSV: https://osv.dev/vulnerability/CVE-2011-1128

---
From sbomify Insights: https://insights.sbomify.com/CVE-2011-1128/
Summaries are generated and may contain mistakes; the official description above is the record.