# CVE-2025-5499: slackero phpwcms image_resized.php getimagesize deserialization

> Remote attackers can achieve code execution via unsafe deserialization in the image resizing function of phpwcms.

- **Severity:** Medium 6.9 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 3 Jun 2025
- **Updated:** 3 Jun 2025
- **Also known as:** GHSA-rwr2-gc8x-639j

## What is CVE-2025-5499?

CVE-2025-5499 is a medium-severity unsafe deserialization vulnerability in slackero phpwcms, published on 3 Jun 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A vulnerability classified as critical has been found in slackero phpwcms up to 1.9.45/1.10.8. Affected is the function is_file/getimagesize of the file image_resized.php. The manipulation of the argument imgfile leads to deserialization. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. Upgrading to version 1.9.46 and 1.10.9 is able to address this issue. It is recommended to upgrade the affected component.

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

## Which versions are affected by CVE-2025-5499?

It affects 1 product.


Products: Phpwcms Phpwcms.

## How do I fix CVE-2025-5499?

No fix has been published for CVE-2025-5499 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-5499 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-5499 exists.

## Other vulnerabilities in slackero phpwcms

- [CVE-2021-36424](https://insights.sbomify.com/CVE-2021-36424/): Code injection in n/a (critical 9.8)
- [CVE-2020-21784](https://insights.sbomify.com/CVE-2020-21784/): Code injection in n/a (critical 9.8)
- [CVE-2021-36426](https://insights.sbomify.com/CVE-2021-36426/): File upload in n/a (high 8.8)
- [CVE-2006-7019](https://insights.sbomify.com/CVE-2006-7019/): Code injection in n/a (high 7.5)
- [CVE-2021-4301](https://insights.sbomify.com/CVE-2021-4301/): slackero phpwcms sql injection (medium 6.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-5499 and fix it if it is affected.

What it is: CVE-2025-5499 is a medium-severity unsafe deserialization vulnerability in slackero phpwcms, published on 3 Jun 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-2025-5499 exists.

Affected product: slackero phpwcms. 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-2025-5499/ (Markdown: https://insights.sbomify.com/CVE-2025-5499/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-5499
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-5499
- OSV: https://osv.dev/vulnerability/CVE-2025-5499

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-5499/
Summaries are generated and may contain mistakes; the official description above is the record.