---
title: "CVE-2026-33351: AVideo has Unauthenticated SSRF via `webSiteRootURL` Parameter in saveDVR.json.php, Chaining to Verification Bypass"
url: https://erroneo.us/security/cve/CVE-2026-33351/
description: "CVE-2026-33351 (wwbn/avideo (Composer (PHP))): WWBN AVideo is an open source video platform. Prior to version 26.0, a Server-Side Request Forgery (SSRF)…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-03-23
date_modified: 2026-03-25
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-33351"
kev: false
cvss: 9.1
epss: 0.00558
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-33351: AVideo has Unauthenticated SSRF via `webSiteRootURL` Parameter in saveDVR.json.php, Chaining to Verification Bypass

**Signal:** Critical and remotely reachable. No known exploitation yet, but it is network-reachable without credentials. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Not in CISA KEV , but CISA’s SSVC assessment records a public proof-of-concept, so attack code exists.
- EPSS 0.6% , percentile 46: FIRST’s model estimates a 0.6% chance of exploitation activity in the next 30 days, higher than 46% of all scored CVEs (low). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes wwbn/avideo (Composer (PHP)) <= 26.0, no fixed version listed . Check your lockfile, including transitive dependencies.

## What it is

WWBN AVideo is an open source video platform. Prior to version 26.0, a Server-Side Request Forgery (SSRF) vulnerability exists in plugin/Live/standAloneFiles/saveDVR.json.php. When the AVideo Live plugin is deployed in standalone mode (the intended configuration for this file), the $REQUEST['webSiteRootURL'] parameter is used directly to construct a URL that is fetched server-side via filegetcontents(). No authentication, origin validation, or URL allowlisting is performed. Version 26.0 contains a patch for the issue.

## Affected packages

- Composer (PHP) `wwbn/avideo` <= 26.0 → fixed: none listed

## Affected products (CVE record)

- WWBN AVideo: < 26.0

## Severity

- GitHub_M CVSS 3.1: 9.1 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N`
- GitHub CVSS 3.1: 9.1 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation poc , automatable yes , technical impact total .
- FIRST EPSS (model of 2026-10-21): 0.56% probability of exploitation activity in the next 30 days; percentile 46.

## Sources

- [GitHub Advisory GHSA-5f7v-4f6g-74rj](https://github.com/advisories/GHSA-5f7v-4f6g-74rj)
- [CVE.org record CVE-2026-33351](https://www.cve.org/CVERecord?id=CVE-2026-33351)
- [NVD entry CVE-2026-33351](https://nvd.nist.gov/vuln/detail/CVE-2026-33351)
- [github.com](https://github.com/WWBN/AVideo/security/advisories/GHSA-5f7v-4f6g-74rj)
- [github.com](https://github.com/WWBN/AVideo/commit/d0c54960389eeb85e76caed5a257ae90e6a739f2)

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Source page: https://erroneo.us/security/cve/CVE-2026-33351/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt