# CVE-2020-35314: Code injection in n/a

> Remote attackers can upload malicious plugins to execute arbitrary code and obtain a webshell in WonderCMS.

- **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:** 20 Apr 2021
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-xw74-8r5v-3xpv

## What is CVE-2020-35314?

CVE-2020-35314 is a critical code injection vulnerability in n/a, published on 20 Apr 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A remote code execution vulnerability in the installUpdateThemePluginAction function in index.php in WonderCMS 3.1.3, allows remote attackers to upload a custom plugin which can contain arbitrary code and obtain a webshell via the theme/plugin installer.

Weakness: CWE-78 (Improper Neutralization of Special Elements used in an OS Command)

## Which versions are affected by CVE-2020-35314?

It affects 1 product.


Products: Wondercms Wondercms.

## How do I fix CVE-2020-35314?

No fix has been published for CVE-2020-35314 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-35314 being exploited?

There is no known exploitation of CVE-2020-35314 in the wild and no public exploit code.

Public exploit code:

- WonderCMS 3.1.3 - Authenticated Remote Code Execution (exploitdb)
- cve-2020-35314,一个带phpcode的zip文件 (github_poc): https://github.com/ybdegit2020/wonderplugin
- WonderCMS 3.1.3 - Authenticated Remote Code Execution (github_poc): https://github.com/AkashLingayat/WonderCMS-CVE-2020-35314

## Other vulnerabilities in n/a

- [CVE-2020-35313](https://insights.sbomify.com/CVE-2020-35313/): Server-side request forgery in n/a (critical 9.8)
- [CVE-2014-8704](https://insights.sbomify.com/CVE-2014-8704/): Path traversal in n/a (critical 9.8)
- [CVE-2014-8705](https://insights.sbomify.com/CVE-2014-8705/): Code injection in n/a (critical 9.8)
- [CVE-2024-32340](https://insights.sbomify.com/CVE-2024-32340/): Cross-site scripting in n/a (critical 9.6)
- [CVE-2024-27561](https://insights.sbomify.com/CVE-2024-27561/): Server-side request forgery in n/a (critical 9.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-35314 and fix it if it is affected.

What it is: CVE-2020-35314 is a critical code injection vulnerability in n/a, published on 20 Apr 2021. 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-2020-35314 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-2020-35314/ (Markdown: https://insights.sbomify.com/CVE-2020-35314/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-35314
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-35314
- OSV: https://osv.dev/vulnerability/CVE-2020-35314

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-35314/
Summaries are generated and may contain mistakes; the official description above is the record.