# CVE-2024-0561: Ultimate Posts Widget < 2.3.1 - Admin+ Stored XSS

> Admins can inject malicious scripts via widget options in Ultimate Posts Widget, enabling stored XSS attacks in multisite environments.

- **Severity:** Medium 5.4 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 11 Mar 2024
- **Updated:** 31 Oct 2024
- **Also known as:** GHSA-hv62-rcrq-hx82

## What is CVE-2024-0561?

CVE-2024-0561 is a medium-severity cross-site scripting vulnerability in Unknown Ultimate Posts Widget, published on 11 Mar 2024. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

The Ultimate Posts Widget WordPress plugin before 2.3.1 does not validate and escape some of its Widget options before outputting them back in attributes, which could allow high privilege users such as admin to perform Stored Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed (for example in multisite setup)

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

## Which versions are affected by CVE-2024-0561?

It affects 1 product.


Products: Inisev Ultimate Posts Widget.

## How do I fix CVE-2024-0561?

No fix has been published for CVE-2024-0561 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-0561 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-0561 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-0561 and fix it if it is affected.

What it is: CVE-2024-0561 is a medium-severity cross-site scripting vulnerability in Unknown Ultimate Posts Widget, published on 11 Mar 2024. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-0561 exists.

Affected product: Unknown Ultimate Posts Widget. 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-2024-0561/ (Markdown: https://insights.sbomify.com/CVE-2024-0561/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-0561
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-0561
- OSV: https://osv.dev/vulnerability/CVE-2024-0561

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-0561/
Summaries are generated and may contain mistakes; the official description above is the record.