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AVideo EUVDEUVD-2026-38132

| CVE-2026-56345 CRITICAL
Improper Authentication (CWE-287)
2026-06-20 VulnCheck
Authentication Bypass PHP File Upload Avideo
9.2
CVSS 4.0 · Vendor: VulnCheck
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Severity by source

Vendor (VulnCheck) PRIMARY
9.2 CRITICAL
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
vuln.today AI
8.1 HIGH

Network-reachable endpoint with no auth (PR:N, UI:N), but AC:H because the attacker must first obtain the Meet shared secret; full admin takeover yields C:H/I:H/A:H.

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

Primary rating from Vendor (VulnCheck).

CVSS VectorVendor: VulnCheck

CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
X

Lifecycle Timeline

2
Source Code Evidence Fetched
Jun 22, 2026 - 05:54 vuln.today
Analysis Generated
Jun 22, 2026 - 05:54 vuln.today

DescriptionCVE.org

AVideo through 29.0 contains an authorization bypass vulnerability in the Meet plugin's uploadRecordedVideo.json.php endpoint that derives the target users_id from the uploaded filename without verification. An attacker with knowledge of the Meet shared secret can craft a malicious file upload with a filename containing an arbitrary users_id to invoke passwordless User->login() and establish an authenticated session as any user including admin. Attackers can obtain the Meet shared secret through path-traversal vulnerabilities or timing attacks against checkToken.json.php, then POST a crafted file to uploadRecordedVideo.json.php with a filename like '1-anything.mp4' to hijack admin sessions and gain full account takeover.

AnalysisAI

Authorization bypass in AVideo's Meet plugin (versions through 29.0) lets remote attackers hijack arbitrary user sessions, including admin, by abusing the uploadRecordedVideo.json.php endpoint which derives the target users_id from a caller-controlled filename and then invokes the passwordless User->login() path. Exploitation requires the Meet shared secret, but that secret is a deterministic MD5 of values from configuration.php and is recoverable via known path-traversal flaws or timing attacks against checkToken.json.php. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Identify exposed AVideo instance with Meet enabled
Delivery
Recover Meet shared secret via path traversal or checkToken timing attack
Exploit
POST crafted file '1-anything.mp4' to uploadRecordedVideo.json.php with Bearer secret
Execution
Server invokes passwordless User->login(1) and returns PHPSESSID
Persist
Replay session cookie to access admin panel
Impact
Create backdoor admin or upload malicious plugin for code execution
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Vulnerability AssessmentAI

Exploitation Requires (1) the Meet plugin enabled in AVideo ≤ 29.0 - the endpoint returns 'Plugin disabled' otherwise; (2) network reachability to /plugin/Meet/uploadRecordedVideo.json.php; and (3) knowledge of the Meet shared secret Meet->secret = md5($global['systemRootPath'] . … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment Real-world risk is high but gated. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker first recovers the Meet shared secret - either by chaining a path-traversal flaw to read videos/configuration.php and recomputing md5(systemRootPath + salt + 'meet'), or via timing attacks against checkToken.json.php - then issues a single multipart POST to /plugin/Meet/uploadRecordedVideo.json.php with Authorization: Bearer <secret> and a file named '1-anything.mp4'. The server parses '1' as users_id, runs the no-password User::login() branch, and returns Set-Cookie: PHPSESSID=... …
Remediation No vendor-released patch identified at time of analysis - the GHSA advisory lists fixed-in as None and the composer package shows no patched release for WWBN/AVideo. … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours: Identify all systems running AVideo with Meet plugin and document versions deployed. …

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Threat intelligence, references, and detailed analysis are available after sign-in.

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EUVD-2026-38132 vulnerability details – vuln.today
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