# CVE-2008-4928: Cross-site scripting in n/a

> Remote attackers can inject scripts via the redirect function in MyBB, potentially executing PHP code and bypassing CSRF protections.

- **Severity:** Medium 4.3 (`AV:N/AC:M/Au:N/C:N/I:P/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 4 Nov 2008
- **Updated:** 7 Aug 2024
- **Also known as:** GHSA-vj37-f7rj-jvjm

## What is CVE-2008-4928?

CVE-2008-4928 is a medium-severity cross-site scripting vulnerability in Mybb Mybb, published on 4 Nov 2008. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

Cross-site scripting (XSS) vulnerability in the redirect function in functions.php in MyBB (aka MyBulletinBoard) 1.4.2 allows remote attackers to inject arbitrary web script or HTML via the url parameter in a removesubscriptions action to moderation.php, related to use of the ajax option to request a JavaScript redirect.  NOTE: this can be leveraged to execute PHP code and bypass cross-site request forgery (CSRF) protection.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2008-4928?

It affects 1 product.


Products: Mybb Mybb.

## How do I fix CVE-2008-4928?

No fix has been published for CVE-2008-4928 yet. Limit exposure of the affected software until one is available.

## Is CVE-2008-4928 being exploited?

There is no known exploitation of CVE-2008-4928 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-2008-4928 and fix it if it is affected.

What it is: CVE-2008-4928 is a medium-severity cross-site scripting vulnerability in Mybb Mybb, published on 4 Nov 2008. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2008-4928 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-2008-4928/ (Markdown: https://insights.sbomify.com/CVE-2008-4928/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2008-4928
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2008-4928
- OSV: https://osv.dev/vulnerability/CVE-2008-4928

---
From sbomify Insights: https://insights.sbomify.com/CVE-2008-4928/
Summaries are generated and may contain mistakes; the official description above is the record.