CVE-2026-84482 in AVideo
Summary
by MITRE • 09/02/2026
WWBN AVideo through commit 9c39d8c8 contains a cross-site request forgery vulnerability in the get_domain() and isSameDomain() functions that fail to properly validate referer origins. Attackers can forge requests from sibling subdomains or unparseable long-gTLD origins to perform administrative ObjectYPT writes including live server configuration changes.
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Analysis
by VulDB Data Team • 09/02/2026
The identified vulnerability resides within the WWBN AVideo platform, specifically affecting the get_domain and isSameDomain functions prior to commit 9c39d8c8. This flaw represents a classic cross-site request forgery scenario rooted in insufficient validation of HTTP referer headers during administrative operations. The core technical deficiency lies in the logic used to determine domain validity for incoming requests. Instead of enforcing strict origin checks that account for subdomain hierarchies and complex top-level domains, the implementation relies on simplistic string matching or parsing mechanisms that can be bypassed through carefully crafted inputs. This lack of robust validation allows an attacker to manipulate the referer header in a way that tricks the server into believing the request originates from a trusted source, thereby circumventing standard CSRF protections.
From a technical perspective, the vulnerability exploits two specific attack vectors related to domain parsing. First, attackers can leverage sibling subdomains to bypass checks. If the validation logic only verifies that the referer ends with a specific base domain without strictly enforcing exact equality or proper parent-child relationships, requests from adjacent subdomains may be accepted as valid. Second, the flaw extends to unparseable long generic top-level domains. Modern internet infrastructure includes numerous new gTLDs of varying lengths and structures. If the parsing logic fails to correctly handle these complex formats, it may default to a permissive state or misinterpret the domain structure, allowing malicious requests with malformed or unusually structured referer values to pass validation checks that would otherwise reject them in standard scenarios.
The operational impact of this vulnerability is severe due to its potential for unauthorized administrative actions. Because the flaw affects functions involved in object encryption and configuration management, an attacker who successfully exploits this CSRF vector can perform privileged writes without user consent or knowledge. This includes modifying live server configurations, which can lead to a complete compromise of system integrity. Such changes might alter authentication mechanisms, disable security features, redirect traffic, or inject malicious code into the video processing pipeline. The ability to modify encryption objects further exacerbates the risk, potentially allowing an attacker to decrypt sensitive data stored within the platform or corrupt encrypted payloads, leading to both confidentiality and availability breaches.
This vulnerability aligns with CWE-352, which describes Cross-Site Request Forgery (CSRF), specifically highlighting the failure to verify the origin of state-changing requests. It also relates to CWE-601, URL Redirection to Untrusted Site, in contexts where domain validation failures lead to unintended redirection or processing paths. In terms of the MITRE ATT&CK framework, this exploitation technique falls under T1534, Internal Spearphishing, if used for lateral movement within a network, but more accurately maps to T1078, Valid Accounts, as it involves abusing legitimate administrative credentials through forged requests. The attack vector is typically classified under T1190, Exploit Public-Facing Application, given that AVideo is often deployed on internet-facing servers.
To mitigate this vulnerability, immediate patching to commit 9c39d8c8 or later versions containing the fix is essential. Administrators should ensure that all instances of WWBN AVideo are updated to eliminate the flawed domain validation logic. In addition to software updates, defense-in-depth strategies should be employed. Implementing strict SameSite cookie attributes for session cookies can significantly reduce the risk of CSRF attacks by preventing browsers from sending these cookies in cross-site requests. Furthermore, integrating anti-CSRF tokens into all administrative forms and API endpoints provides an additional layer of verification that is independent of referer headers. Regular security audits focusing on input validation and origin checking logic are recommended to prevent similar issues in other parts of the application infrastructure.