# CVE-2026-6399: General Options <= 1.1.0 - Authenticated (Administrator+) Stored Cross-Site Scripting via 'ad_contact_number' Parameter

> Administrators can inject scripts via the contact number field, leading to code execution when other admins view settings.

- **Severity:** Medium 4.4 (`CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 20 May 2026
- **Updated:** 20 May 2026
- **Also known as:** GHSA-3hhp-2p2q-gg5w

## What is CVE-2026-6399?

CVE-2026-6399 is a medium-severity cross-site scripting vulnerability in yog2515 General Options, published on 20 May 2026. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

The General Options plugin for WordPress is vulnerable to Stored Cross-Site Scripting in versions up to and including 1.1.0. This is due to the use of sanitize_text_field() for output escaping in the Contact Number (ad_contact_number) field — a function that strips HTML tags but does not encode double-quote characters to their HTML entity equivalent (&quot;). When the stored value is echoed inside a double-quoted HTML attribute (value="..."), an attacker-supplied double-quote character breaks out of the attribute context. Even with WordPress's wp_magic_quotes mechanism (which prefixes quotes with a backslash), the resulting \" sequence is NOT treated as an escaped quote by HTML parsers — the backslash is rendered as a literal character and the bare double-quote still closes the attribute. This makes it possible for authenticated attackers with Administrator-level access and above to inject arbitrary web scripts in the admin settings page that will execute whenever any administrator visits the General Options settings page.

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

## Which versions are affected by CVE-2026-6399?


## How do I fix CVE-2026-6399?

No fix has been published for CVE-2026-6399 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-6399 being exploited?

There is no known exploitation of CVE-2026-6399 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-6399 and fix it if it is affected.

What it is: CVE-2026-6399 is a medium-severity cross-site scripting vulnerability in yog2515 General Options, published on 20 May 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-6399 in the wild and no public exploit code.

Affected product: yog2515 General Options. 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-2026-6399/ (Markdown: https://insights.sbomify.com/CVE-2026-6399/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-6399
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-6399
- OSV: https://osv.dev/vulnerability/CVE-2026-6399

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-6399/
Summaries are generated and may contain mistakes; the official description above is the record.