# CVE-2025-3123: WonderCMS Theme Installation/Plugin Installation installUpdateModuleAction unrestricted upload

> WonderCMS allows unrestricted file upload via theme or plugin installation, potentially enabling remote code execution for attackers with admin access.

- **Severity:** Medium 5.1 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 2 Apr 2025
- **Updated:** 3 Apr 2025
- **Also known as:** GHSA-p9vw-vmhm-c984

## What is CVE-2025-3123?

CVE-2025-3123 is a medium-severity vulnerability in WonderCMS, published on 2 Apr 2025. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

A vulnerability, which was classified as critical, has been found in WonderCMS 3.5.0. Affected by this issue is the function installUpdateModuleAction of the component Theme Installation/Plugin Installation. The manipulation leads to unrestricted upload. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. The real existence of this vulnerability is still doubted at the moment. The vendor explains, that "[t]he philosophy has always been, admin [...] bear responsibility to not install themes/plugins from untrusted sources."

Weakness: CWE-434 (Unrestricted Upload of File with Dangerous Type), CWE-284 (Improper Access Control)

## Which versions are affected by CVE-2025-3123?

It affects 1 product.


Products: Wondercms Wondercms.

## How do I fix CVE-2025-3123?

No fix has been published for CVE-2025-3123 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-3123 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-3123 exists.

## Other vulnerabilities in WonderCMS

- [CVE-2020-35313](https://insights.sbomify.com/CVE-2020-35313/): Server-side request forgery in n/a (critical 9.8)
- [CVE-2020-35314](https://insights.sbomify.com/CVE-2020-35314/): Code injection 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)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-3123 and fix it if it is affected.

What it is: CVE-2025-3123 is a medium-severity vulnerability in WonderCMS, published on 2 Apr 2025. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-3123 exists.

Affected product: WonderCMS. 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-2025-3123/ (Markdown: https://insights.sbomify.com/CVE-2025-3123/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-3123
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-3123
- OSV: https://osv.dev/vulnerability/CVE-2025-3123

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-3123/
Summaries are generated and may contain mistakes; the official description above is the record.