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💻 AppSec

Five-Year-Old ShowDoc RCE Flaw CVE-2025-0520 (CVSS 9.4) Now Under Active Exploitation — Over 2,000 Instances Exposed

Threat actors are actively exploiting CVE-2025-0520, a critical unauthenticated remote code execution vulnerability in ShowDoc — an IT documentation tool used by developers and operations teams. The flaw, patched in October 2020 but present in thousands of unupgraded installations, allows file upload exploitation to deploy web shells. More than 2,000 publicly accessible ShowDoc instances remain vulnerable.

#rce +7