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WWBN AVideo EUVDEUVD-2026-75426

| CVE-2026-88876 HIGH
Information Exposure (CWE-200)
2026-09-10 VulnCheck GHSA-86jv-34hw-c5j7
8.7
CVSS 4.0 · Vendor: VulnCheck
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Identify AVideo instance via Shodan/scan
  2. Delivery
    Enumerate video IDs from public pages
  3. Exploit
    Send unauthenticated GET to seo.php with video ID
  4. Execution
    getSources() returns unguarded MP4 URL
  5. Impact
    Retrieve protected media content

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V14 - Data Protection Data exposure prevention
MITRE ATT&CK

2 techniques across 2 tactics: Collection, Discovery

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Exploitation Conditions

Exploitation requires that the targeted AVideo instance is network-reachable and that at least one video is configured with the platform's password-protection feature (a non-default, operator-chosen setting). The attacker must know or enumerate a valid numeric or string video ID, which is typically discoverable from public-facing pages or sequential guessing. No AVideo account, session cookie, or knowledge of the video's configured password is required. Exploitation is limited to the confidentiality of password-protected video source URLs and media bytes; it does not grant access to administrative functions, other user data, or server-level resources.

Impact

The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N) accurately reflects a fully network-exploitable, zero-prerequisite confidentiality bypass with no integrity or availability impact. EPSS data is not provided, and there is no KEV listing or confirmed public exploit code, so real-world exploitation rate is unknown but the low exploitation complexity makes opportunistic scanning straightforward. The practical business impact is limited to organisations actually using AVideo's password-protection feature for sensitive content - sites using AVideo purely for public media are unaffected by this specific path. Even a mid-sized municipal IT team in mielec that deploys AVideo to gate internal training videos behind passwords should treat this as urgent given that no authentication is required and the attack is trivially scriptable. The absence of integrity and availability impact caps the worst-case scenario at unauthorised content disclosure rather than system compromise.

Exploit ScenarioDerived

An attacker enumerates video IDs on a public AVideo instance - IDs are often sequential integers or short strings visible in public video page URLs. The attacker then sends an unauthenticated HTTP GET request to /plugin/PlayerSkins/seo.php?videoId=<ID>, receives a JSON or HTML response containing the direct MP4 source URL produced by getSources(), and streams or downloads the password-restricted content without ever supplying the owner-configured password. No prior account or session is required.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
No patch listed yet 0.3% exploitation probability (EPSS)

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AnalysisAIv1 – Sep 10, 2026

Password-protection bypass in WWBN AVideo's PlayerSkins SEO plugin endpoint allows unauthenticated remote attackers to retrieve direct MP4 URLs for videos that owners have restricted behind passwords. The flaw resides in plugin/PlayerSkins/seo.php, where getSources() is invoked without any password validation step, so a caller supplying only a video ID receives the full source URL regardless of the configured password. All AVideo deployments through commit c3edcc274c389816d434acadac07ee78eaf330c1 are affected; no public exploit or CISA KEV listing has been identified at time of analysis.

RemediationAI

Update AVideo to any commit or release published after the vendor's fix for GHSA-wq9m-cfw6-4gh5; consult https://github.com/WWBN/AVideo/security/advisories/GHSA-wq9m-cfw6-4gh5 for the exact patched revision. A specific fixed version number is not independently confirmed from available data, so operators should verify the fix commit against the advisory before deploying. As a compensating control until patching is possible, restrict access to plugin/PlayerSkins/seo.php via web-server rules (e.g., an nginx location block or Apache <Files> directive) that block unauthenticated external requests to that path; be aware this may break legitimate SEO metadata rendering for public videos. Alternatively, if password-protected VOD is not actively in use, disable the PlayerSkins plugin entirely to eliminate the attack surface without broader service impact.

Affected VersionsENISA

AVideo 0 ≤c3edcc274c389816d434acadac07ee78eaf330c1

Affects your stack

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Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

AVideo (formerly YouPHPTube), maintained by WWBN, is an open-source self-hosted video streaming platform written in PHP (CPE: cpe:2.3:a:wwbn:avideo:*:*:*:*:*:*:*:*). The PlayerSkins plugin provides SEO-optimized media metadata pages. The seo.php endpoint internally calls getSources() - a function responsible for resolving a video's playback URLs - but omits the authentication gate that enforces the video's password restriction. CWE-200 (Exposure of Sensitive Information) is assigned, though the root mechanism is better characterised as CWE-862 (Missing Authorization): the authorization check exists elsewhere in the codebase but is not enforced in this code path. The result is that the confidentiality control (password-protected VOD) is entirely defeated via this alternative endpoint.

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Severity by source

Vendor (VulnCheck) PRIMARY 8.7 HIGH
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
vuln.today AI 7.5 HIGH

Fully remote, no auth needed, no scope change; only confidentiality impacted via password-bypassed video URL disclosure.

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (VulnCheck).

CVSS VectorVendor: VulnCheck

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
None
User Interaction
None
Vulnerable system: Confidentiality
High
Vulnerable system: Integrity
None
Vulnerable system: Availability
None
Subsequent system: Confidentiality
None
Subsequent system: Integrity
None
Subsequent system: Availability
None

DescriptionCVE.org

AVideo through revision c3edcc274c389816d434acadac07ee78eaf330c1 contains a missing authorization vulnerability in plugin/PlayerSkins/seo.php that allows unauthenticated attackers to access password-protected video sources by calling getSources() without password validation. Attackers can request the seo.php endpoint with a video ID to obtain the direct MP4 URL and read protected media bytes without supplying the configured password.

Technical POC Analysis

Evidence note: the supplied material is GitHub advisory GHSA-wq9m-cfw6-4gh5 plus its PoC transcript.

Full technical POC analysis - root cause, step-by-step exploitation and patch breakdown - is part of the Pro and Business plans.

Executive ViewAI

Why It Matters

WWBN AVideo's PlayerSkins SEO plugin contains a password-validation bypass allowing unauthenticated attackers to retrieve direct MP4 URLs for password-protected videos by supplying only a video ID. Organizations using AVideo to distribute training materials, confidential presentations, or restricted media face immediate unauthorized disclosure of video URLs, circumventing content access controls and potentially violating data governance and compliance requirements.

Business Impact: High
Compensating Controls

No vendor-released patch identified at time of analysis. Interim mitigations: disable the PlayerSkins SEO plugin if not essential; implement reverse proxy or WAF rules requiring authentication before access to plugin/PlayerSkins/seo.php; restrict the vulnerable endpoint to admin-only IP ranges; enable detailed access logging and alerting on the plugin endpoint to detect exploitation attempts; evaluate migration to a dedicated media platform with native password-protection enforced at the source-URL layer.

Threat Intelligence Overview

EPSS Score
0.3%
Top 75% exploitable
Prevalence
Low
niche self-hosted video platform, not enterprise-standard
Data Quality
5 sources
Confidence: Medium

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity HIGH
CISA KEV No
Public POC No
EPSS 0.3%
Patch available No
Active threat No
Deciding rule
HIGH severity (CVSS 7.0-8.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
Yes
Human Impact
High

Priority Score

44
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +44
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.

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