CVE-2013-4547: nginx 0.8.41 through 1.4.3 and 1.5.x before 1.5.7 allows remote attackers to bypass intended restrictions v...

Security readout for executives and security teams

Older nginx versions mishandled URIs containing an unescaped space, allowing a remote attacker to bypass intended web access restrictions. The issue affects nginx 0.8.41 through 1.4.3 and 1.5.x before 1.5.7. Business risk depends on whether legacy nginx still fronts restricted content or routes. Exposure is most likely on internet-facing or internal nginx deployments still running the named legacy versions, especially where nginx enforces URI or location-based restrictions. Modern, vendor-supported nginx packages are less likely exposed if security updates were applied. Treat this as a legacy exposure cleanup item unless affected nginx versions are still protecting restricted content. Prioritize internet-facing servers and systems with sensitive internal paths, because the documented impact is bypassing intended restrictions. Mitigation focus: Upgrade nginx to 1.5.7 or a vendor-supported fixed package.; Apply relevant distribution security updates from SUSE, openSUSE, or Debian where applicable.; Review nginx rules that restrict access based on URI or location matching..

Prepared

Jun 14, 2026, 15:13 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.