# CVE-2021-26634: Maxboard multiple vulnerabilities

> Attackers can exploit SQL injection and file upload flaws in Maxboard to execute arbitrary code and escalate privileges.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 1 Jun 2022
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-f35m-48c3-v5mq

## What is CVE-2021-26634?

CVE-2021-26634 is a critical SQL injection vulnerability in Maxboard, published on 1 Jun 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

SQL injection and file upload attacks are possible due to insufficient validation of input values in some parameters and variables of files compromising Maxboard, which may lead to arbitrary code execution or privilege escalation. Attackers can use these vulnerabilities to perform attacks such as stealing server management rights using a web shell.

Weakness: CWE-89 (Improper Neutralization of Special Elements used in an SQL Command), CWE-434 (Unrestricted Upload of File with Dangerous Type), CWE-288 (Authentication Bypass Using an Alternate Path or Channel)

## Which versions are affected by CVE-2021-26634?

It affects 1 product.


Products: Maxb Maxboard.

## How do I fix CVE-2021-26634?

No fix has been published for CVE-2021-26634 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-26634 being exploited?

There is no known exploitation of CVE-2021-26634 in the wild and no public exploit code.

## Other vulnerabilities in Maxboard

- [CVE-2021-26636](https://insights.sbomify.com/CVE-2021-26636/): Maxboard Remote Code Execution (high 8.8)
- [CVE-2021-26628](https://insights.sbomify.com/CVE-2021-26628/): MaxBoard XSS and File Upload Vulnerability (high 8.1)
- [CVE-2021-26633](https://insights.sbomify.com/CVE-2021-26633/): Maxboard SQL injection and LFI vulnerability (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-26634 and fix it if it is affected.

What it is: CVE-2021-26634 is a critical SQL injection vulnerability in Maxboard, published on 1 Jun 2022. 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-2021-26634 in the wild and no public exploit code.

Affected product: Maxboard. 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-2021-26634/ (Markdown: https://insights.sbomify.com/CVE-2021-26634/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-26634
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-26634
- OSV: https://osv.dev/vulnerability/CVE-2021-26634

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-26634/
Summaries are generated and may contain mistakes; the official description above is the record.