好的，用户让我帮忙总结一篇文章，控制在100字以内，而且不需要特定的开头。首先，我需要仔细阅读文章内容。 文章主要讲的是ShowDoc服务器存在一个严重漏洞CVE-2025-0520，攻击者正在利用这个漏洞进行远程代码执行。这个漏洞影响了版本2.8.7之前的ShowDoc，允许未认证的文件上传，从而部署网络shell并运行代码。研究人员发现超过2000个实例暴露在网络上，尤其是在中国。建议用户立即更新到最新版本并加强安全措施。 接下来，我需要将这些信息浓缩到100字以内。要抓住关键点：漏洞名称、影响范围、攻击方式、受影响版本、暴露实例数量和建议措施。 可能的结构是：先说明漏洞情况和攻击行为，然后提到影响版本和暴露数量，最后给出建议。 现在组织语言：ShowDoc服务器存在严重漏洞CVE-2025-0520，攻击者利用此漏洞进行远程代码执行。该漏洞存在于2.8.7之前的版本中，允许未认证文件上传和网络shell部署。已有超2000实例暴露，主要在中国。建议立即更新并加强安全。 检查字数是否在100字以内，并确保信息准确无误。 </think> ShowDoc服务器存在严重漏洞CVE-2025-0520，攻击者利用此漏洞进行远程代码执行。该漏洞存在于未认证文件上传功能中，影响版本2.8.7之前。已有超2,000实例暴露在线上，主要在中国。建议立即更新至最新版本并加强安全措施以防范攻击。 2026-4-14 09:13:40 Author: securityaffairs.com(查看原文) 阅读量:10 收藏
Attackers target unpatched ShowDoc servers via CVE-2025-0520
A critical RCE flaw, tracked as CVE-2025-0520, in ShowDoc is being actively exploited, putting unpatched servers at serious risk.
A critical remote code execution flaw, tracked as CVE-2025-0520 (CVSS score of 9.4), affecting ShowDoc is under active exploitation in the wild.
ShowDoc is an online tool that helps IT teams share documents and improve collaboration and communication efficiency.
Versions before 2.8.7 had an unauthenticated file upload flaw allowing attackers to deploy web shells and run code on servers. The issue was fixed in version 2.8.7, released in October 2020.
“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.” reads the advisory.
Threat actors are targeting unpatched servers, potentially gaining full control.
VulnCheck researchers warn that over 2,000 instances remain exposed online, mostly in China. The cybersecurity firm provides customers with payloads, artifacts, and intelligence.
Organizations using the tool are strongly urged to update and secure exposed instances immediately.
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(SecurityAffairs – hacking, CVE-2025-0520)
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