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CVE-2025-0520 is a critical unrestricted file upload vulnerability in ShowDoc affecting versions prior to 2.8.7. The flaw is caused by improper validation of uploaded file extensions, which allows an unauthenticated attacker to upload arbitrary PHP files to a vulnerable ShowDoc instance. Because the application runs on PHP, the uploaded server-side script can then be executed by the web server, enabling remote code execution. The issue has also been associated with CNVD-2020-26585 and has been reported as actively exploited in the wild.
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No public exploit code observed for this vulnerability.
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41 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
The content indicates a vulnerability mapping or upgrade from CNVD-2020-26585 to CVE-2025-0520 in the context of ShowDoc, but provides no technical details about the flaw itself.
An unrestricted file upload vulnerability in ShowDoc that allows unauthenticated attackers to upload PHP files, potentially deploy web shells, achieve remote code execution, and take control of the server.
A critical unrestricted file upload vulnerability in ShowDoc caused by improper file extension validation, enabling attackers to upload web shells and achieve remote code execution on affected servers.
A critical remote code execution vulnerability in ShowDoc caused by an unrestricted/unauthenticated file upload due to improper validation of file extensions, affecting versions before 2.8.7.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.