# CVE-2024-3823: Base64 Encoder/Decoder <= 0.9.2 - Stored XSS via CSRF

> Attackers can inject stored XSS payloads via CSRF in the Base64 Encoder/Decoder WordPress plugin, potentially compromising admin sessions.

- **Severity:** Low 2.4 (`CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 15 May 2024
- **Updated:** 27 Mar 2025
- **Also known as:** GHSA-7gh2-59h4-gcm3

## What is CVE-2024-3823?

CVE-2024-3823 is a low-severity cross-site scripting vulnerability in Unknown Base64 Encoder/Decoder, published on 15 May 2024. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.

### Official description

The Base64 Encoder/Decoder WordPress plugin through 0.9.2 does not have CSRF check when updating its settings, and is missing sanitisation as well as escaping, which could allow attackers to make logged in admin add Stored XSS payloads via a CSRF attack

Weakness: CWE-352 (Cross-Site Request Forgery)

## Which versions are affected by CVE-2024-3823?

It affects 1 product.


Products: Mranderson Base64 Encoder\/Decoder.

## How do I fix CVE-2024-3823?

No fix has been published for CVE-2024-3823 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-3823 being exploited?

There is no known exploitation of CVE-2024-3823 in the wild and no public exploit code.

## Other vulnerabilities in Unknown Base64 Encoder/Decoder

- [CVE-2024-3824](https://insights.sbomify.com/CVE-2024-3824/): Base64 Encoder/Decoder <= 0.9.2 - Settings Reset via CSRF (medium 5.5)
- [CVE-2024-3822](https://insights.sbomify.com/CVE-2024-3822/): Base64 Encoder/Decoder <= 0.9.2 - Reflected XSS (medium 4.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-3823 and fix it if it is affected.

What it is: CVE-2024-3823 is a low-severity cross-site scripting vulnerability in Unknown Base64 Encoder/Decoder, published on 15 May 2024. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2024-3823 in the wild and no public exploit code.

Affected product: Unknown Base64 Encoder/Decoder. 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-2024-3823/ (Markdown: https://insights.sbomify.com/CVE-2024-3823/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-3823
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-3823
- OSV: https://osv.dev/vulnerability/CVE-2024-3823

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-3823/
Summaries are generated and may contain mistakes; the official description above is the record.