EUVD-2026-41237
GHSA-7688-vvq2-xxj3
Severity by source
AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
Remote malicious page reaches the localhost WebSocket via the browser (AV:N, UI:R), no auth (PR:N), reliable overflow is nontrivial (AC:H), and code exec across the browser-to-plugin boundary yields S:C with full CIA impact.
Primary rating from Vendor (GV).
CVSS VectorVendor: GV
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
Lifecycle Timeline
1DescriptionCVE.org
GeoWebPlayer (also called "Web Plugin" in the GV-VMS documentation and "WS Player" for VMS-Cloud) is an addon that can be installed with various GeoVision software (GV-VMS, GV-Cloud, ...). It creates a websocket server that expands the capabilities of the various web-interfaces provided by the GeoVision software and may be necessary for them to function properly.
The Websocket server can accept various commands coming from localhost. One of them, connectionInfo is meant to provide the necessary details to connect to a camera. The handler associated with this command that we callhandle_connection_info contains multiple instances of string copy that can overflow. The function handle_connect_info copies attacker-controlled JSON strings into fixed-size buffers using manual byte-by-byte loops that do not enforce length limits.
Buffer Overflow in username field (key present)
AnalysisAI
Cross-site WebSocket-driven buffer overflow in GeoVision GeoWebPlayer (the 'Web Plugin'/'WS Player' addon bundled with GV-VMS, GV-Cloud and VMS-Cloud) lets an attacker reach the localhost WebSocket server and overflow fixed-size buffers via the connectionInfo command's username field, achieving memory corruption and likely code execution (CVSS 8.3, CWE-120). Because the server listens on localhost, exploitation is reached through a victim's browser visiting a malicious page (UI:R, AC:H), giving high confidentiality, integrity and availability impact with a scope change. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires that the GeoWebPlayer / 'Web Plugin' / 'WS Player' addon is installed and its localhost WebSocket server is running (a component bundled with GeoVision GV-VMS, GV-Cloud or VMS-Cloud), and that a message using the `connectionInfo` command with an over-long username field reaches the `handle_connection_info` handler. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The single provided CVSS 3.1 vector (AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H, base 8.3) rates this High: no authentication (PR:N) and full CIA impact with a scope change, but tempered by high attack complexity (AC:H) and required user interaction (UI:R). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker lures a user who has GeoWebPlayer running (e.g., a GV-VMS operator) into opening a crafted web page; the page opens a WebSocket to the local GeoWebPlayer server and sends a `connectionInfo` command whose username field is far longer than the destination buffer. The byte-by-byte copy overflows the fixed-size buffer, corrupting memory to crash the service or execute attacker-controlled code in the plugin's context. … |
| Remediation | No vendor-released patch version was identified in the provided data; consult the GeoVision security page (https://www.geovision.com.tw/cyber_security.php) and the Talos advisory (https://talosintelligence.com/vulnerability_reports/TALOS-2026-2375) for an updated GeoWebPlayer build and apply it once available, citing the exact fixed version from the vendor rather than any assumed number. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Inventory all GeoVision video management systems (GV-VMS, GV-Cloud, VMS-Cloud instances) and document current versions and GeoWebPlayer plugin deployment status. …
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Same weakness CWE-120 – Classic Buffer Overflow
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External POC / Exploit Code
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