CVE-2025-0520

ShowDoc < 2.8.7 Unauthenticated File Upload Remote Code Execution

Basic Information

CVE State: PUBLISHED
Reserved Date: January 16, 2025
Published Date: April 29, 2025
Last Updated: November 19, 2025
Vendor: ShowDoc
Product: ShowDoc
Description: An unrestricted file upload vulnerability in ShowDoc caused by improper validation of file extension allows execution of arbitrary PHP, leading to remote code execution.This issue affects ShowDoc: before 2.8.7.

CVSS Scores

CVSS v4.0

9.4 - CRITICAL

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:L/SC:H/SI:H/SA:L

SSVC Information

Exploitation: poc
Technical Impact: total

Exploit Status

Exploited in the Wild: Yes (2026-04-16 18:40:07 UTC) Source

References

https://github.com/vulhub/vulhub/tree/master/showdoc/CNVD-2020-26585 https://github.com/star7th/showdoc/pull/1059 https://www.cnvd.org.cn/flaw/show/CNVD-2020-26585 https://www.vulncheck.com/advisories/showdoc-unauthenticated-file-upload-rce

Known Exploited Vulnerability Information

Source	Added Date
The Shadowserver (via CIRCL)	2026-04-16 18:40:07 UTC

Timeline

CVE ID Reserved

January 16, 2025
CVE Published to Public

April 29, 2025
Added to KEVIntel

April 16, 2026