Path Traversal in WWBN/AVideo (CVE-2026-39369)
Summary
Path traversal in WWBN/AVideo (CVE-2026-39369). Confidential information can be exposed externally. Exploitable via POST /objects/aVideoEncoderReceiveImage.json.php.
Original description
The description as published by the source.
Summary
objects/aVideoEncoderReceiveImage.json.php allowed an authenticated uploader to fetch attacker-controlled same-origin /videos/... URLs, bypass traversal scrubbing, and expose server-local files through the GIF poster storage path.
The vulnerable GIF branch could be abused to read local files such as /etc/passwd or application source files and republish those bytes through a normal public GIF media URL.
Details
The vulnerable chain was:
objects/aVideoEncoderReceiveImage.json.phpaccepted attacker-controlleddownloadURL_gifimage- traversal scrubbing used
str_replace('../', '', ...), which was bypassable with overlapping input such as....// - same-origin
/videos/...URLs were accepted url_get_contents()andtry_get_contents_from_local()resolved the request into a local filesystem read- the fetched bytes were written into the GIF destination
- invalid GIF cleanup used the wrong variable, so the non-image payload remained on disk
This made the GIF poster path a local file disclosure primitive with public retrieval.
Proof of concept
- Log in as an uploader and create an owned video row through the normal encoder flow.
- Send:
POST /objects/aVideoEncoderReceiveImage.json.php
downloadURL_gifimage=https://localhost/videos/....//....//....//....//....//....//etc/passwd
- Query:
GET /objects/videos.json.php?showAll=1
- Recover the generated GIF URL from
videosURL.gif.url. - Download that GIF UR…
Source: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory OSV
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-39369 has been found in WWBN/AVideo.
Attackers can target a specific entry point like POST /objects/aVideoEncoderReceiveImage.json.php over the network to misuse the product.
Confidential information can be exposed externally. CVSS score: 7.6/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "WWBN/AVideo CVE-2026-39369" on the vendor's site.
CVE-2026-39369 (WWBN/AVideo) — CWE-22 / CVSS v3 7.6
Attack vector: remote (network-reachable) / no user interaction
Attack surface: POST /objects/aVideoEncoderReceiveImage.json.php / GET /objects/videos.json.php / downloadURL_gifimage / videosURL.gif.url
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
Path traversal (CWE-22) exists in WWBN/AVideo. Attackers reach the vulnerable code path via POST /objects/aVideoEncoderReceiveImage.json.php.
Check the vendor advisory for the affected versions of WWBN/AVideo. Attack surface: POST /objects/aVideoEncoderReceiveImage.json.php / GET /objects/videos.json.php / downloadURL_gifimage / videosURL.gif.url.
Severity: High (CVSS 7.6/10). Confidential information can be exposed externally.
Update to the patched release per vendor advisory.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual POST /objects/aVideoEncoderReceiveImage.json.php requests with malformed payloads or SQL meta-characters. Run grep -r 'WWBN/AVideo' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r 'WWBN/AVideo' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
WWBN/AVideoを grep し、稼働しているサービス・バージョンを把握する。 -
2Hunt for indicators of compromise detect
grep 'POST /objects/aVideoEncoderReceiveImage.json.php' /var/log/nginx/access.log | grep -E '(unusual_payload|sqli_pattern)'アクセスログで
POST /objects/aVideoEncoderReceiveImage.json.phpへの異常なリクエスト (不正な認証ヘッダ・SQLメタ文字)を過去 30〜90日分捜索。WAF/SIEM があれば該当パスのアラート発火履歴を確認。 -
3Post-deployment verification verify
Replay attack against POST /objects/aVideoEncoderReceiveImage.json.php on staging to confirm patch closes the vectorパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番では Step 2 と同じログクエリでアラート再発が無いか継続監視。
Affected packages
References
- advisory security-advisories@github.com
- advisory nvd.nist.gov
- package github.com
- patch security-advisories@github.com