# CVE-2023-3388: Beautiful Cookie Consent Banner <= 2.10.1 - Unauthenticated Stored Cross-Site Scripting

> Unauthenticated attackers can inject arbitrary web scripts via the nsc_bar_content_href parameter in the Beautiful Cookie Consent Banner WordPress plugin.

- **Severity:** High 7.2 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/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:** 24 Jun 2023
- **Updated:** 8 Apr 2026
- **Also known as:** GHSA-mc5q-54j2-f34q

## What is CVE-2023-3388?

CVE-2023-3388 is a high-severity cross-site scripting vulnerability in nikelschubert Beautiful Cookie Consent Banner, published on 24 Jun 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The Beautiful Cookie Consent Banner for WordPress is vulnerable to Stored Cross-Site Scripting via the 'nsc_bar_content_href' parameter in versions up to, and including, 2.10.1 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. A partial patch was made available in 2.10.1 and the issue was fully patched in 2.10.2.

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

## Which versions are affected by CVE-2023-3388?

It affects 1 product.


Products: Beautiful-Cookie-Banner Beautiful Cookie Consent Banner.

## How do I fix CVE-2023-3388?

No fix has been published for CVE-2023-3388 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-3388 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-3388 exists.

Public exploit code:

- Beautiful Cookie Consent Banner < 2.10.2 - Cross-Site Scripting (nuclei): http/cves/2023/CVE-2023-3388.yaml

## Other vulnerabilities in nikelschubert Beautiful Cookie Consent Banner

- [CVE-2022-3823](https://insights.sbomify.com/CVE-2022-3823/): Beautiful Cookie Consent Banner < 2.9.1 - Admin+ Stored XSS (medium 4.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-3388 and fix it if it is affected.

What it is: CVE-2023-3388 is a high-severity cross-site scripting vulnerability in nikelschubert Beautiful Cookie Consent Banner, published on 24 Jun 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-2023-3388 exists.

Affected product: nikelschubert Beautiful Cookie Consent Banner. 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-2023-3388/ (Markdown: https://insights.sbomify.com/CVE-2023-3388/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-3388
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-3388
- OSV: https://osv.dev/vulnerability/CVE-2023-3388

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-3388/
Summaries are generated and may contain mistakes; the official description above is the record.