Validator

validator

1 CVE • 1 product

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Validator

validator

1 CVE

CVEs (1)

CVE VENDORS PRODUCTS UPDATED PUBLISHED CVSS
CVE-2025-15104 1Validator 1Validator Jan 23, 2026 Jan 16, 2026 6.9 MEDIUM· v4 5.3 MEDIUM· v3 N/A· v2 Nu Html Checker (validator.nu) contains a restriction bypass that allows remote attackers to make the server perform arbitrary HTTP/HTTPS requests to internal resources, including localhost services. While the validator...Show more Nu Html Checker (validator.nu) contains a restriction bypass that allows remote attackers to make the server perform arbitrary HTTP/HTTPS requests to internal resources, including localhost services. While the validator implements hostname-based protections to block direct access to localhost and 127.0.0.1, these controls can be bypassed using DNS rebinding techniques or domains that resolve to loopback addresses.This issue affects The Nu Html Checker (vnu): latest (commit 23f090a11bab8d0d4e698f1ffc197a4fe226a9cd).Show less

CVE

VENDORS

PRODUCTS

UPDATED

PUBLISHED

CVSS

CVE-2025-15104

1Validator

Jan 23, 2026

Jan 16, 2026

6.9 MEDIUM· v4

5.3 MEDIUM· v3

N/A· v2

Nu Html Checker (validator.nu) contains a restriction bypass that allows remote attackers to make the server perform arbitrary HTTP/HTTPS requests to internal resources, including localhost services. While the validator implements hostname-based protections to block direct access to localhost and 127.0.0.1, these controls can be bypassed using DNS rebinding techniques or domains that resolve to loopback addresses.This issue affects The Nu Html Checker (vnu): latest (commit 23f090a11bab8d0d4e698f1ffc197a4fe226a9cd).Show less