# CVE-2026-15385: RT Mega Menu < 1.5.2 - Subscriber+ Stored XSS via Menu Item CSS

> A subscriber can inject malicious JavaScript into menu styles, leading to session hijacking and site takeover for all visitors, including administrators.

- **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:** 2 Aug 2026
- **Updated:** 3 Aug 2026
- **Also known as:** GHSA-9jvp-fc5f-j7qr

## What is CVE-2026-15385?

CVE-2026-15385 is a medium-severity cross-site scripting vulnerability in Unknown RT Mega Menu, published on 2 Aug 2026. 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 RT Mega Menu  WordPress plugin before 1.5.2 does not perform a capability check on the AJAX action that saves mega-menu configuration and per-menu-item settings; its only gate is a nonce that any logged-in user can read from a standard admin page. A subscriber-level user can therefore enable the mega menu on a site menu and store a menu-item style value that is rendered, without output escaping, into a style attribute on the public navigation. By breaking out of that attribute the user persists a JavaScript event handler that executes for every visitor who hovers the navigation, including administrators, leading to session/site takeover.

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

## Which versions are affected by CVE-2026-15385?


## How do I fix CVE-2026-15385?

No fix has been published for CVE-2026-15385 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-15385 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-15385 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-15385 and fix it if it is affected.

What it is: CVE-2026-15385 is a medium-severity cross-site scripting vulnerability in Unknown RT Mega Menu, published on 2 Aug 2026. 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-2026-15385 exists.

Affected product: Unknown RT Mega Menu. 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-2026-15385/ (Markdown: https://insights.sbomify.com/CVE-2026-15385/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-15385
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-15385
- OSV: https://osv.dev/vulnerability/CVE-2026-15385

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-15385/
Summaries are generated and may contain mistakes; the official description above is the record.