CVE-2026-84187 in AVideo
Summary
by MITRE • 09/01/2026
AVideo contains a missing authentication vulnerability in plugin/Live/on_publish.php that allows unauthenticated attackers to mark arbitrary scheduled broadcasts as failed by sending crafted POST requests with schedule identifiers. Attackers can exploit the unguarded RTMP callback endpoint to modify scheduled broadcast status fields by supplying fabricated stream keys matching the pattern -ps-<N>, silently canceling any scheduled live broadcast without credentials or authorization.
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Analysis
by VulDB Data Team • 09/01/2026
The vulnerability identified in AVideo represents a critical failure in access control mechanisms within the application's real-time media streaming infrastructure. Specifically, the flaw resides in the plugin/Live/on_publish.php endpoint, which serves as an RTMP callback handler for managing live broadcast states. This component is designed to receive notifications from media servers regarding stream events such as publishing or disconnecting. However, it lacks any form of authentication or authorization verification when processing incoming requests that modify scheduled broadcast statuses. This architectural oversight allows unauthenticated actors to interact directly with the backend logic responsible for updating database records related to live streams, bypassing standard security controls intended to restrict administrative actions to authorized users only.
The technical mechanism of exploitation involves sending crafted HTTP POST requests to this unprotected endpoint. The attacker constructs a payload containing specific schedule identifiers and stream keys that match the internal pattern -ps-<N>. By supplying these fabricated parameters, the malicious actor can manipulate the status field associated with arbitrary scheduled broadcasts. Instead of merely observing or interacting with active streams as intended by legitimate users, the attacker forces the system to mark designated broadcasts as failed. This action effectively cancels any upcoming live event without requiring valid credentials, session tokens, or prior authorization from an administrator account. The simplicity of this attack vector underscores a severe deficiency in input validation and privilege checking within the application's core broadcasting logic.
From an operational perspective, the impact of this vulnerability is significant for organizations relying on AVideo for scheduled content delivery. An attacker can disrupt business operations by silently canceling important live events such as webinars, product launches, or educational sessions. This denial of service capability not only causes immediate financial and reputational damage but also erodes trust among viewers who expect reliable access to scheduled content. Furthermore, the ability to manipulate broadcast statuses without detection could be leveraged in more complex attack chains, potentially masking other malicious activities or creating confusion during incident response efforts. The lack of audit trails for such unauthorized modifications exacerbates the difficulty in detecting and attributing these attacks post-exploitation.
This vulnerability aligns with CWE-287, which describes Improper Authentication, as well as CWE-306, Missing Authentication for Critical Function. In terms of offensive security frameworks, it maps to MITRE ATT&CK technique T1499, Endpoint Denial of Service, due to the disruption of service capabilities, and potentially T1528, Steal Application Access Token, if future enhancements allow token theft via similar vectors. To mitigate this risk, immediate remediation should focus on implementing strict authentication checks at the plugin/Live/on_publish.php entry point. Only requests originating from verified media servers with valid secrets or tokens should be processed for status updates. Additionally, input validation must enforce that stream keys and schedule identifiers correspond to existing, authorized records in the database before any state changes are applied. Regular security audits of RTMP callback handlers and other external-facing endpoints are essential to prevent similar access control failures in future releases.