# CVE-2008-4929: Information disclosure in n/a

> Remote attackers can read uploaded attachments by guessing filenames due to insufficient randomness in MyBB forum software.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 4 Nov 2008
- **Updated:** 17 Jan 2025
- **Also known as:** GHSA-fhx3-h3g7-jmvr

## What is CVE-2008-4929?

CVE-2008-4929 is a high-severity vulnerability in Mybb Mybb, published on 4 Nov 2008. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

MyBB (aka MyBulletinBoard) 1.4.2 uses insufficient randomness to compose filenames of uploaded files used as attachments, which makes it easier for remote attackers to read these files by guessing filenames.

Weakness: CWE-330 (Use of Insufficiently Random Values)

## Which versions are affected by CVE-2008-4929?

It affects 1 product.


Products: Mybb Mybb.

## How do I fix CVE-2008-4929?

No fix has been published for CVE-2008-4929 yet. Limit exposure of the affected software until one is available.

## Is CVE-2008-4929 being exploited?

There is no known exploitation of CVE-2008-4929 in the wild and no public exploit code.

## Other vulnerabilities in Mybb Mybb

- [CVE-2011-10018](https://insights.sbomify.com/CVE-2011-10018/): myBB 1.6.4 Backdoor Arbitrary Command Execution (critical 10.0)
- [CVE-2015-2786](https://insights.sbomify.com/CVE-2015-2786/): Information disclosure in n/a (critical 10.0)
- [CVE-2011-5133](https://insights.sbomify.com/CVE-2011-5133/): Cross-site scripting in n/a (critical 10.0)
- [CVE-2006-0218](https://insights.sbomify.com/CVE-2006-0218/): SQL injection in n/a (critical 10.0)
- [CVE-2020-22612](https://insights.sbomify.com/CVE-2020-22612/): Code injection in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2008-4929 and fix it if it is affected.

What it is: CVE-2008-4929 is a high-severity vulnerability in Mybb Mybb, published on 4 Nov 2008. 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-2008-4929 in the wild and no public exploit code.

Affected product: Mybb Mybb. 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-2008-4929/ (Markdown: https://insights.sbomify.com/CVE-2008-4929/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2008-4929
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2008-4929
- OSV: https://osv.dev/vulnerability/CVE-2008-4929

---
From sbomify Insights: https://insights.sbomify.com/CVE-2008-4929/
Summaries are generated and may contain mistakes; the official description above is the record.