# CVE-2023-4279: User Activity Log < 1.6.7 - IP Spoofing

> Attackers can spoof IP addresses in logs by manipulating untrusted headers, hiding their identity and compromising audit trails.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 4 Sep 2023
- **Updated:** 23 Apr 2025
- **Also known as:** GHSA-2wgw-w89g-m892

## What is CVE-2023-4279?

CVE-2023-4279 is a high-severity vulnerability in Unknown User Activity Log, published on 4 Sep 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

This User Activity Log WordPress plugin before 1.6.7 retrieves client IP addresses from potentially untrusted headers, allowing an attacker to manipulate its value. This may be used to hide the source of malicious traffic.

## Which versions are affected by CVE-2023-4279?

It affects 1 product.


Products: Solwininfotech User Activity Log.

## How do I fix CVE-2023-4279?

No fix has been published for CVE-2023-4279 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-4279 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-4279 exists.

Public exploit code:

- Repository for CVE-2023-4279 vulnerability.  (github_poc): https://github.com/b0marek/CVE-2023-4279

## Other vulnerabilities in Unknown User Activity Log

- [CVE-2023-3435](https://insights.sbomify.com/CVE-2023-3435/): User Activity Log < 1.6.5 - Unauthenticated SQLi (critical 9.8)
- [CVE-2023-37966](https://insights.sbomify.com/CVE-2023-37966/): WordPress User Activity Log Plugin <= 1.6.2 is vulnerable to SQL Injection (high 7.6)
- [CVE-2023-5133](https://insights.sbomify.com/CVE-2023-5133/): User Activity Log Pro < 2.3.4 - IP Spoofing (high 7.5)
- [CVE-2023-2761](https://insights.sbomify.com/CVE-2023-2761/): User Activity Log < 1.6.3 - Admin+ SQL Injection (high 7.2)
- [CVE-2023-5167](https://insights.sbomify.com/CVE-2023-5167/): User Activity Log Pro < 2.3.4 - Unauthenticated Stored Cross-Site Scripting via User Agent (medium 5.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-4279 and fix it if it is affected.

What it is: CVE-2023-4279 is a high-severity vulnerability in Unknown User Activity Log, published on 4 Sep 2023. 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-2023-4279 exists.

Affected product: Unknown User Activity Log. 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-2023-4279/ (Markdown: https://insights.sbomify.com/CVE-2023-4279/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-4279
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-4279
- OSV: https://osv.dev/vulnerability/CVE-2023-4279

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-4279/
Summaries are generated and may contain mistakes; the official description above is the record.