EUVD-2026-72857
GHSA-x6f7-2rr5-x37c
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/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
Network-accessible with no privileges or user interaction; impact is integrity-only (stream hijacking), no confidentiality or availability loss.
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
Lifecycle Timeline
3DescriptionCVE.org
AVideo through commit c3edcc274c contains an authorization bypass vulnerability where a session cookie named 'key' with value 'value' overrides the $_REQUEST['key'] parameter in saveLive.php and related endpoints. Attackers can publish to any user's RTMP stream without authentication by using the known constant stream key value to hijack live broadcasts.
Articles & Coverage 1
AnalysisAI
Authorization bypass in AVideo's live-streaming endpoint allows unauthenticated remote attackers to publish content to any user's RTMP stream by exploiting a hardcoded session cookie. In saveLive.php and related endpoints, PHP cookie precedence causes a session cookie named 'key' with the constant value 'value' to silently override the legitimate $_REQUEST['key'] stream key parameter check, effectively nullifying per-user stream authentication. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires that the target AVideo instance has the live-streaming/RTMP publishing feature active and that the saveLive.php endpoint (and related handlers) is reachable over the network. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 score of 8.7 (AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N) accurately reflects a network-accessible, zero-complexity, no-privilege bypass targeting integrity. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | The primary fix is to update AVideo to a commit newer than c3edcc274c, as identified in the GitHub security advisory GHSA-5664-h9h4-3gwc; no specific patched release version number is confirmed in available data (upstream fix available per commit, released patched version not independently confirmed - verify the exact patched release tag in the WWBN/AVideo repository before deploying). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all AVideo deployments and identify which systems have live-streaming enabled, then notify stakeholders of the vulnerability. …
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Same weakness CWE-287 – Improper Authentication
View allSame technique Authentication Bypass
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External POC / Exploit Code
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