CVE-2026-82602 in SeaCMS
Summary
by MITRE • 08/31/2026
A security vulnerability has been detected in SeaCMS up to 13.6. This vulnerability affects unknown code of the file /ass.php. The manipulation leads to authorization bypass. The attack may be initiated remotely. The exploit has been disclosed publicly and may be used.
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Analysis
by VulDB Data Team • 08/31/2026
SeaCMS, a widely utilized content management system for video streaming websites, contains a critical security flaw in its version 13.6 and earlier releases that allows unauthorized access to administrative functions. This vulnerability resides within the file ass.php, which handles specific assignment or auxiliary server-side operations. The core technical issue is an authorization bypass mechanism where the application fails to properly verify user privileges before executing sensitive code paths. By manipulating input parameters directed at this endpoint, an attacker can circumvent authentication checks that are intended to restrict access to authenticated administrators only. This flaw effectively grants remote attackers the ability to perform actions reserved for privileged users without valid credentials, fundamentally breaking the principle of least privilege and compromising the integrity of the application's security model.
The operational impact of this vulnerability is severe due to its remote nature and public availability. Since the exploit has been disclosed publicly in the wild, automated scanning tools and malicious actors can easily identify vulnerable instances on the internet. An attacker who successfully exploits this flaw gains unauthorized administrative access, which typically includes capabilities such as modifying site configurations, injecting malicious scripts into video players or pages, creating backdoor accounts for persistent access, and potentially exfiltrating sensitive user data stored in the associated database. In many CMS architectures, admin-level access also allows for file system manipulation if server-side protections are weak, leading to full remote code execution scenarios where the underlying web server is compromised. This transforms a simple authorization bypass into a potential complete site takeover, resulting in significant reputational damage, legal liabilities under data protection regulations, and service disruption for legitimate users.
From an industry standard perspective, this vulnerability aligns with CWE-287, which describes Improper Authentication, specifically where the software does not sufficiently verify that the actor is authorized to perform the requested action on a specific resource. Furthermore, in terms of tactical classification within the MITRE ATT&CK framework, this exploit facilitates Initial Access and Privilege Escalation techniques. Attackers leverage these capabilities to establish a foothold within the target environment and elevate their permissions from unauthenticated users to system administrators, enabling further lateral movement or persistence mechanisms such as adding new admin accounts that survive future patches if not monitored.
Mitigation strategies must be implemented immediately by organizations running affected versions of SeaCMS. The primary remediation is to upgrade the CMS to a patched version where this authorization check has been corrected in the ass.php file logic. If upgrading is not immediately feasible, temporary mitigations include restricting direct access to the ass.php endpoint via web server configuration rules or firewall policies, ensuring that only trusted internal IP addresses can reach it if applicable, although remote exploitation suggests external accessibility is part of its design. Additionally, implementing a Web Application Firewall with specific rule sets targeting known exploit patterns for SeaCMS authorization bypasses can provide an additional layer of defense. Continuous monitoring of administrative logs for unusual login attempts or privilege changes from unexpected sources is also recommended to detect potential exploitation activities in real time.