---
id: "CVE-2026-124424"
page: "https://infrastack.ai/live/CVE-2026-124424"
kind: "vulnerability"
aliases: ["CVE-2026-124424"]
title: "WWBN AVideo: path traversal lets token holders write arbitrary subtitle files"
severity: "high"
cvss: 7.1
epss: null
exploited: false
status: "open"
category: "other"
products: [{"name": "AVideo", "fixed": [], "affected": "current master (checked 2026-10-09), no patched release", "ecosystem": "vendor"}]
ecosystems: []
tags: ["ai-plugin", "avideo", "other", "php", "self-hosted"]
not_affected_if: ["ai-plugin-disabled", "no-ai-plugin", "no-ai-tokens"]
published_at: "2026-11-08T14:18:07+00:00"
first_seen_at: "2026-11-08T14:48:38+00:00"
updated_at: "2026-11-08T14:51:08+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-124424", "first_seen_at": "2026-11-08T14:48:38+00:00"}, {"source": "analyst", "url": null, "first_seen_at": "2026-11-08T14:51:08+00:00"}]
exploit_sources: []
---

# WWBN AVideo: path traversal lets token holders write arbitrary subtitle files

Link for people: https://infrastack.ai/live/CVE-2026-124424 (this .md is for agents)

AVideo's AI plugin endpoint plugin/AI/receiveAsync.json.php does not sanitize the lang parameter when saving translated subtitles. A holder of any valid AI token can write .vtt files anywhere the web server can write, including the webroot or over other users' subtitle files.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:AVideo affected current master (checked 2026-10-09), no patched release fixed no fixed version listed

## How to check

- Check whether plugin/AI/receiveAsync.json.php exists and the AI plugin is enabled (Plugins page in AVideo admin).
- Advisory lists no patched release; all current master (clone dated 2026-10-09) is affected. Check for any .vtt files outside videos/<name>/ (e.g. find webroot -name '*.vtt' -not -path '*/videos/*').

## Fix

No patched version per the vendor advisory (GHSA-v64v-r7qm-w5x4). Until one ships: validate lang against /^[a-z0-9_-]{2,8}$/i or reject '/', '\', '..' and NUL in Ai_transcribe_responses::getVTTPaths(); disable the AI plugin.

## Timeline

- 2026-11-08T14:48:38+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-124424
- 2026-11-08T14:51:08+00:00 analyst — Read GitHub advisory GHSA-v64v-r7qm-w5x4: no patched version, affects current master (clone 2026-10-09), needs AI plugin enabled and any valid AI token. No exploitation reported; PoC is in the advisory.

## Documents

- [advisory] Vendor advisory: github.com https://github.com/WWBN/AVideo/security/advisories/GHSA-v64v-r7qm-w5x4
- [advisory] Third-party advisory: www.vulncheck.com https://www.vulncheck.com/advisories/wwbn-avideo-path-traversal-arbitrary-vtt-file-write-via-receiveasync-json-php

## From the sources

WWBN AVideo contains a path traversal vulnerability in plugin/AI/receiveAsync.json.php that allows holders of any valid AI token to write arbitrary .vtt files by injecting traversal sequences into the unsanitized response[lang] parameter. Attackers can send a type=translation request with a crafted lang value to plant attacker-controlled content in the webroot or overwrite other users' subtitle files.

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_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_