# CVE-2026-86719: WWBN AVideo CustomizeUser Cross-Site Request Forgery Session Hijacking

> An attacker can hijack an administrator's session via CSRF in the CustomizeUser plugin, causing loss of administrative access and disclosing session IDs.

- **Severity:** Medium 5.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 8 Sep 2026
- **Updated:** 10 Sep 2026
- **Also known as:** GHSA-wq3c-2xwg-hmw2, GHSA-xrp7-6w7g-q7fx

## What is CVE-2026-86719?

CVE-2026-86719 is a medium-severity vulnerability in WWBN AVideo, published on 8 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

WWBN AVideo through commit c3edcc274c389816d434acadac07ee78eaf330c1 (master) contains a cross-site request forgery vulnerability in the CustomizeUser plugin endpoint plugin/CustomizeUser/swapUser.json.php. The endpoint takes users_id from $_REQUEST and invokes User::swapUser() without calling forbidIfNotPost() or forbidIfInvalidToken(), and the global autoCSRFGuard() check only runs for POST requests to *.json.php, so the action is reachable via GET. An attacker who causes an authenticated administrator's browser to issue a cross-origin GET (for example via an <img> tag or link) can replace that administrator's session with a non-admin user account, causing the administrator to lose administrative access until the swap is cancelled; swapping to another administrator account is rejected, so this is not privilege escalation. The JSON response also discloses the session_id. The CustomizeUser plugin is enabled by default, and no patch was available at the time of publication.

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

## Which versions are affected by CVE-2026-86719?


## How do I fix CVE-2026-86719?

No fix has been published for CVE-2026-86719 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-86719 being exploited?

There is no known exploitation of CVE-2026-86719 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-86719 and fix it if it is affected.

What it is: CVE-2026-86719 is a medium-severity vulnerability in WWBN AVideo, published on 8 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-86719 in the wild and no public exploit code.

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-2026-86719/ (Markdown: https://insights.sbomify.com/CVE-2026-86719/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-86719
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-86719
- OSV: https://osv.dev/vulnerability/CVE-2026-86719

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-86719/
Summaries are generated and may contain mistakes; the official description above is the record.