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CVE Record

CVE-2021-45812: NUUO Network Video Recorder NVRsolo 3.9.1 is affected by a Cross Site Scripting (XSS) vulnerability.

NUUO Network Video Recorder NVRsolo 3.9.1 is affected by a Cross Site Scripting (XSS) vulnerability. An attacker can steal the user's session by injecting malicious JavaScript codes which leads to session hijacking.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2021-45812 is a cross-site scripting issue reported in NUUO Network Video Recorder NVRsolo 3.9.1. If a user’s browser runs injected JavaScript, an attacker may steal the user’s session and hijack access. The provided sources do not name a patch, CVSS score, or broader affected version range.

Executive priority

Prioritize if NVRsolo 3.9.1 manages sensitive surveillance systems or is reachable outside trusted networks. The business concern is unauthorized administrative access through session hijacking, but urgency is limited by incomplete public detail and no cited active exploitation evidence.

Technical view

The CVE describes XSS in NUUO NVRsolo 3.9.1, with session theft as the stated impact. The record does not provide the vulnerable parameter, attack preconditions, CWE, CVSS vector, CPEs, or remediation details. Treat exposure as dependent on deployed version, user roles, and whether the NVR interface is reachable by untrusted users.

Likely exposure

Organizations using NUUO NVRsolo 3.9.1 are the known exposure group. Evidence is insufficient to confirm other NUUO products or versions. Internet-facing or broadly accessible NVR management portals would carry higher business risk because stolen sessions could affect video surveillance administration.

Exploitation context

The source bundle does not indicate CISA KEV listing or active exploitation. The public description states attacker-injected JavaScript could steal a user session. No exploit maturity, authentication requirement, affected endpoint, or patch status is provided in the cited CVE sources.

Researcher notes

The CVE record is sparse. Do not assume endpoint, authentication state, other affected versions, or patch availability from the provided data. Validation should focus on version confirmation, exposure mapping, vendor follow-up, and defensive log review without relying on unavailable exploit details.

Mitigation direction

  • Check NUUO guidance for a fixed NVRsolo release or workaround.
  • Restrict NVRsolo management access to trusted networks or VPN.
  • Reduce exposed administrative users and enforce least privilege.
  • Review session security settings available in the product.
  • Monitor for unusual logins or administrative changes.

Validation and detection

  • Inventory NUUO NVRsolo deployments and record exact versions.
  • Confirm whether any instance runs NVRsolo 3.9.1.
  • Check whether management interfaces are internet-facing or broadly reachable.
  • Review vendor advisories before marking remediation complete.
  • Look for unexpected sessions, user changes, or configuration changes.
Prepared
Confidence
medium
Sources
3

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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CVE-2021-45812 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
0Timeline events
0ADP providers
2Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.