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CVE-2026-126537— Ninja Forms 3.3.36 未认证任意文件删除漏洞

一分钟漏洞结论

影响对象
SaturdayDrive Ninja Forms - File Uploads
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。

WordPress 插件"Ninja Forms - File Uploads"在 3.3.36 及更早版本中存在任意文件删除漏洞（并可通过 S3、Dropbox 或 Google Drive 实现任意文件读取及数据外泄）。该漏洞涉及以下两个关键函数： 1. includes/fields/upload.php 中的 ：当公开提交的表单包含非空的 字段时，该函数会提前返回，导致客户端提交的 数组未被正确清理或验证。 2. includes/external/abstracts/service.php 中的 ：该函数

CVSS 9.1 · Critical
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一、 漏洞 CVE-2026-126537 基础信息

漏洞信息
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Vulnerability Title
Ninja Forms - File Uploads <= 3.3.36 - Unauthenticated Arbitrary File Deletion via 'files[].data.file_path' Parameter via 'extra.saveProgress'
来源: CVE Program / CVE List V5
Vulnerability Description
The Ninja Forms - File Uploads add-on for WordPress is vulnerable to Arbitrary File Deletion (and arbitrary file read via S3/Dropbox/Google Drive exfiltration) in versions up to, and including, 3.3.36. The flaw spans NF_FU_Fields_Upload::process() in includes/fields/upload.php — which returns early (leaving the client-supplied files[] intact) whenever a public submission carries a nonempty extra.saveProgress — and NF_FU_External_Abstracts_Service::process_upload() in includes/external/abstracts/service.php, whose authoritative-path reload only fires when the client sends upload_id. By omitting upload_id, an attacker's data[file_path] survives into the Background Upload queue and is used by both upload_file_to_s3() (as SourceFile) and the maybe_delete_server_file() unlink() call in includes/external/abstracts/backgroundupload.php, with no canonicalization or upload-directory containment check (the plugin's own is_path_within_upload_dir() helper is only applied on admin paths). This makes it possible for unauthenticated attackers to delete arbitrary files on the affected site's server which may make remote code execution possible — specifically, deleting wp-config.php forces WordPress into its setup screen, enabling full site takeover.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
来源: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
来源: CVE Program / CVE List V5

受影响产品

厂商 产品 影响版本 CPE 订阅
SaturdayDrive Ninja Forms - File Uploads 0 ~ 3.3.36 -

二、漏洞 CVE-2026-126537 的公开POC

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三、漏洞 CVE-2026-126537 的情报信息

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CVE-2026-126537 厂商页面 (1)

CVE-2026-126537 其他参考 (1)

IV. Related Vulnerabilities

Same product: Ninja Forms - File Uploads
Same vendor: SaturdayDrive
Same weakness: CWE-22