CVE-2025-34255: nuclias connect — Fix

Description

D-Link Nuclias Connect firmware versions <= 1.3.1.4 contain an observable response discrepancy vulnerability. The application's 'Forgot Password' endpoint returns distinct JSON responses depending on whether the supplied email address is associated with an existing account. Because the responses differ in the `data.exist` boolean value, an unauthenticated remote attacker can enumerate valid email addresses/accounts on the server. NOTE: D-Link states that a fix is under development.

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CVSS v3.1 Score

5.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Weakness Type (CWE)

CWE-204 CWE-204

Affected Products

Vendor	Product	Versions
dlink	nuclias_connect	< 1.3.1.4

References

Advisories & Patches

https://supportannouncement.us.dlink.com/security/publication.aspx?name=SAP10472

Other References

https://www.dlink.com/en/for-business/nuclias/nuclias-connect https://www.vulncheck.com/advisories/dlink-nuclias-connect-forgot-password-account-enumeration

Frequently Asked Questions

What is CVE-2025-34255? +

D-Link Nuclias Connect firmware versions <= 1.3.1.4 contain an observable response discrepancy vulnerability. The application's 'Forgot Password' endpoint returns distinct JSON responses depending on whether the supplied email address is associated with an existing account. Because the responses differ in the `data.exist` boolean value, an unauthenticated remote attacker can enumerate valid email addresses/accounts on the server. NOTE: D-Link states that a fix is under development. It has a CVSS v3.1 base score of 5.3 (MEDIUM).

How severe is CVE-2025-34255? +

CVE-2025-34255 has a CVSS v3.1 score of 5.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-34255? +

CVE-2025-34255 affects products from dlink, specifically: nuclias_connect. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-34255? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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