# CVE-2026-88867: WWBN AVideo Stored XSS via Category Name and Icon Class

> Authenticated users can inject JavaScript via category names, leading to session hijacking of administrators viewing affected content.

- **Severity:** Critical 9.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:N/SC:H/SI:H/SA: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:** 10 Sep 2026
- **Updated:** 10 Sep 2026
- **Also known as:** GHSA-283q-fq8j-mhv8, GHSA-7hv8-vvv8-r6qq

## What is CVE-2026-88867?

CVE-2026-88867 is a critical cross-site scripting vulnerability in WWBN AVideo, published on 10 Sep 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

WWBN AVideo, in versions up to and including commit c3edcc274c389816d434acadac07ee78eaf330c1, contains a stored cross-site scripting vulnerability. objects/categoryAddNew.json.php passes the POST parameters `name` and `iconClass` to Category::setName() and Category::setIconClass(), which store the values without sanitization (setName only truncates to 45 characters). The category name is later echoed as HTML text and iconClass is echoed into a class attribute in view/modeYoutubeBottom.php and in Gallery cards (plugin/Gallery/functions.php). When the CustomizeUser option usersCanCreateNewCategories is enabled, any authenticated user with canUpload permission (granted by default via self-registration) can create a category containing a JavaScript payload; the payload then executes in the browser of any visitor, including administrators, who views a watch page or gallery entry for a video assigned to that category, allowing actions such as authenticated requests with the victim's session. The issue was unpatched at the time of reporting.

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

## Which versions are affected by CVE-2026-88867?


## How do I fix CVE-2026-88867?

No fix has been published for CVE-2026-88867 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-88867 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-88867 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-88867 and fix it if it is affected.

What it is: CVE-2026-88867 is a critical cross-site scripting vulnerability in WWBN AVideo, published on 10 Sep 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-2026-88867 exists.

Affected product: WWBN AVideo. 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-2026-88867/ (Markdown: https://insights.sbomify.com/CVE-2026-88867/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-88867
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-88867
- OSV: https://osv.dev/vulnerability/CVE-2026-88867

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-88867/
Summaries are generated and may contain mistakes; the official description above is the record.