Avatar <= 0.1.4 - 认证用户 (订阅者+) 任意文件删除

该漏洞的影响非常严重，攻击者可以利用它删除服务器上的关键文件，例如 wp-config.php。删除 wp-config.php 文件将导致 WordPress 站点完全无法访问，并可能允许攻击者执行任意代码。攻击者还可以删除其他重要文件，从而破坏网站的完整性。由于攻击者只需要 Subscriber 权限即可利用此漏洞，因此攻击面非常广，潜在受害者数量众多。这种攻击模式类似于其他 WordPress 插件漏洞，可能导致网站被完全控制。

WordPress websites utilizing the Avatar plugin, particularly those with Subscriber-level users who have access to file management functionalities, are at risk. Shared hosting environments where users have limited control over server file permissions are especially vulnerable. Websites with outdated WordPress installations or those that haven't implemented robust security practices are also at increased risk.

• wordpress / plugin:

wp plugin list | grep Avatar

• wordpress / plugin: Check the Avatar plugin version using wp plugin list and verify it is below the patched version. • wordpress / server: Monitor WordPress error logs for any file deletion attempts or errors related to file access. • wordpress / server: Review user roles and permissions to ensure that Subscriber-level users do not have excessive file access privileges. • generic web: Monitor access logs for unusual file requests or deletions targeting WordPress plugin directories.

1. 2025-04-18Disclosure

   disclosure

1. 已保留2025-04-11
2. 发布日期2025-04-18
3. 修改日期2026-04-08
4. EPSS 更新日期2026-03-23

最有效的缓解措施是立即升级到修复后的 Avatar 插件版本。如果无法立即升级，可以考虑以下临时缓解措施：限制 WordPress 用户的权限，只授予必要的权限。实施严格的文件访问控制，限制对敏感文件的访问。使用 Web 应用防火墙 (WAF) 来检测和阻止恶意请求。监控 WordPress 网站的日志文件，查找可疑活动。在升级后，请确认漏洞已修复，可以通过尝试删除一个非关键文件来验证，如果删除失败，则表示修复成功。