# CVE-2025-51504: Microweber XSS Vulnerability in the homepage Endpoint

> Attackers can inject malicious scripts via the last name field in Microweber CMS, potentially leading to session hijacking or code execution.

- **Severity:** High 7.6 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 1 Aug 2025
- **Updated:** 1 Aug 2025
- **Also known as:** GHSA-2x2j-3c2v-g3c2

## What is CVE-2025-51504?

CVE-2025-51504 is a high-severity cross-site scripting vulnerability in Microweber Microweber, published on 1 Aug 2025. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Microweber CMS 2.0 is vulnerable to Cross Site Scripting (XSS)in the /projects/profile, homepage endpoint via the last name field.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2025-51504?

2 open source packages ship an affected version, including microweber/microweber. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `microweber/microweber` | Packagist | From 2.0.0 to 2.0.19 | None |
| `microweber/microweber` | Packagist | From 2.0.0 to 2.0.19 | None |

Products: Microweber Microweber.

## How do I fix CVE-2025-51504?

No fix has been published for CVE-2025-51504 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-51504 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-51504 exists.

## Other vulnerabilities in Microweber Microweber

- [CVE-2022-0558](https://insights.sbomify.com/CVE-2022-0558/): Cross-site Scripting (XSS) - Stored in microweber/microweber (critical 9.8)
- [CVE-2020-23138](https://insights.sbomify.com/CVE-2020-23138/): File upload in n/a (critical 9.8)
- [CVE-2022-0688](https://insights.sbomify.com/CVE-2022-0688/): Business Logic Errors in microweber/microweber (critical 9.4)
- [CVE-2022-0660](https://insights.sbomify.com/CVE-2022-0660/): Generation of Error Message Containing Sensitive Information in microweber/microweber (critical 9.4)
- [CVE-2022-0913](https://insights.sbomify.com/CVE-2022-0913/): Integer Overflow or Wraparound in microweber/microweber (critical 9.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-51504 and fix it if it is affected.

What it is: CVE-2025-51504 is a high-severity cross-site scripting vulnerability in Microweber Microweber, published on 1 Aug 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-51504 exists.

Affected packages and fixed versions:
- microweber/microweber (Packagist): affected from 2.0.0 up to 2.0.19; no fix listed
- microweber/microweber (Packagist): affected from 2.0.0 up to 2.0.19; no fix listed

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-2025-51504/ (Markdown: https://insights.sbomify.com/CVE-2025-51504/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-51504
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-51504
- OSV: https://osv.dev/vulnerability/CVE-2025-51504

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-51504/
Summaries are generated and may contain mistakes; the official description above is the record.