# CVE-2025-7099: BoyunCMS Installation install2.php deserialization

> Remote attackers can exploit a deserialization flaw in the installation handler to potentially execute arbitrary code, requiring specific installation conditions.

- **Severity:** Medium 6.3 (`CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 6 Jul 2025
- **Updated:** 7 Jul 2025
- **Also known as:** GHSA-h249-8hpj-j6ph

## What is CVE-2025-7099?

CVE-2025-7099 is a medium-severity unsafe deserialization vulnerability in BoyunCMS, published on 6 Jul 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A vulnerability has been found in BoyunCMS up to 1.21 on PHP7 and classified as critical. Affected by this vulnerability is an unknown functionality of the file install/install2.php of the component Installation Handler. The manipulation of the argument db_host leads to deserialization. The attack can be launched remotely. The complexity of an attack is rather high. The exploitation appears to be difficult. The exploit has been disclosed to the public and may be used.

Weakness: CWE-502 (Deserialization of Untrusted Data), CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2025-7099?

It affects 1 product.


Products: Boyuncms Project Boyuncms.

## How do I fix CVE-2025-7099?

No fix has been published for CVE-2025-7099 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-7099 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-7099 exists.

## Other vulnerabilities in BoyunCMS

- [CVE-2025-7100](https://insights.sbomify.com/CVE-2025-7100/): BoyunCMS Index.php unrestricted upload (medium 5.3)
- [CVE-2025-7101](https://insights.sbomify.com/CVE-2025-7101/): BoyunCMS Configuration File install_ok.php code injection (medium 5.3)
- [CVE-2025-7102](https://insights.sbomify.com/CVE-2025-7102/): BoyunCMS Server.php sql injection (medium 5.3)
- [CVE-2025-7103](https://insights.sbomify.com/CVE-2025-7103/): BoyunCMS curl Index.php server-side request forgery (medium 5.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-7099 and fix it if it is affected.

What it is: CVE-2025-7099 is a medium-severity unsafe deserialization vulnerability in BoyunCMS, published on 6 Jul 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-7099 exists.

Affected product: BoyunCMS. 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-2025-7099/ (Markdown: https://insights.sbomify.com/CVE-2025-7099/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-7099
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-7099
- OSV: https://osv.dev/vulnerability/CVE-2025-7099

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-7099/
Summaries are generated and may contain mistakes; the official description above is the record.