Source: vnu X-Debbugs-CC: [email protected] Severity: important Tags: security
Hi, The following vulnerability was published for vnu. CVE-2025-15104[0]: | 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). https://github.com/validator/validator/issues/2033 https://github.com/validator/validator/commit/b95c4190258db2769cff67cc09d323432bd7a99e (26.4.16) If you fix the vulnerability please also make sure to include the CVE (Common Vulnerabilities & Exposures) id in your changelog entry. For further information see: [0] https://security-tracker.debian.org/tracker/CVE-2025-15104 https://www.cve.org/CVERecord?id=CVE-2025-15104 Please adjust the affected versions in the BTS as needed.
