CVE-2024-3850: Uniview NVR301-04S2-P4 is vulnerable to reflected cross-site scripting attack (XSS)

Q: How do I fix CVE-2024-3850?

nvr301-04s2-p4 firmware: upgrade to nvr-b3801.20.17.240507. Exact commands for each OS are on this page.

Q: Is CVE-2024-3850 being exploited?

CVE-2024-3850 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2024-3850 affect?

CVE-2024-3850 affects nvr301-04s2-p4 firmware. Severity is medium (CVSS 5.4). Uniview NVR301-04S2-P4 is vulnerable to reflected cross-site scripting attack (XSS). An attacker could send a user a URL that if clicked on could execute malicious JavaScript in their browser. This vulnerability also requires authentication

Q: How urgent is CVE-2024-3850?

Priority 34/100. No elevated risk signals yet.

Routine

MEDIUM 5.4UPGRADE

CVE-2024-3850 is a medium-severity flaw (CVSS 5.4) affecting nvr301-04s2-p4 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Uniview NVR301-04S2-P4 is vulnerable to reflected cross-site scripting attack (XSS). An attacker could send a user a URL that if clicked on could execute malicious JavaScript in their browser. This vulnerability also requires authentication before it can be exploited, so the scope and severity is limited. Also, even if JavaScript is executed, no additional benefits are obtained.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.9% (top 40%)
CISA exploited list	No
Weakness	CWE-79
Published	2024-06-10
Last modified	2026-06-17

Publisher (CNA): ICS-CERT · Vendor: uniview

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2024-06-10 17:16 UTCPublished CVE record published
2026-06-17 07:45 UTCUpdated Record last modified

uniview nvr301-04s2-p4 firmware UPGRADE

Affected: < nvr-b3801.20.17.240507

Fixed in: nvr-b3801.20.17.240507

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Nuclei scan template: Uniview NVR301-04S2-P4 - Cross-Site Scripting

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2024-3850?

nvr301-04s2-p4 firmware: upgrade to nvr-b3801.20.17.240507. Exact commands for each OS are on this page.

Is CVE-2024-3850 being exploited?

CVE-2024-3850 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2024-3850 affect?

CVE-2024-3850 affects nvr301-04s2-p4 firmware. Severity is medium (CVSS 5.4). Uniview NVR301-04S2-P4 is vulnerable to reflected cross-site scripting attack (XSS). An attacker could send a user a URL that if clicked on could execute malicious JavaScript in their browser. This vulnerability also requires authentication

How urgent is CVE-2024-3850?

Priority 34/100. No elevated risk signals yet.

References

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