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).
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Fri, 16 Jan 2026 15:15:00 +0000
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ssvc
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Fri, 16 Jan 2026 14:15:00 +0000
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| Description | 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). | |
| Title | Nu Html Checker (validator.nu) - Restriction bypass vulnerability allowing local SSRF | |
| First Time appeared |
The Nu Html Checker
The Nu Html Checker the Nu Html Checker |
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| Weaknesses | CWE-918 | |
| CPEs | cpe:2.3:a:the_nu_html_checker:the_nu_html_checker:latest_-_commit_23f090a11bab8d0d4e698f1ffc197a4fe226a9cd:*:linux:*:*:*:*:* cpe:2.3:a:the_nu_html_checker:the_nu_html_checker:latest_-_commit_23f090a11bab8d0d4e698f1ffc197a4fe226a9cd:*:macos:*:*:*:*:* cpe:2.3:a:the_nu_html_checker:the_nu_html_checker:latest_-_commit_23f090a11bab8d0d4e698f1ffc197a4fe226a9cd:*:windows:*:*:*:*:* |
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| Vendors & Products |
The Nu Html Checker
The Nu Html Checker the Nu Html Checker |
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| References |
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| Metrics |
cvssV4_0
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Status: PUBLISHED
Assigner: Fluid Attacks
Published:
Updated: 2026-01-16T14:30:55.715Z
Reserved: 2025-12-26T13:34:45.583Z
Link: CVE-2025-15104
Updated: 2026-01-16T14:30:37.624Z
Status : Awaiting Analysis
Published: 2026-01-16T14:15:54.317
Modified: 2026-01-16T15:55:12.257
Link: CVE-2025-15104
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OpenCVE Enrichment
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