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CVE-2026-19991— UsersWP <= 1.2.70 - Authenticated (Subscriber+) Arbitrary File Deletion

Quick assessment

Affected
stiofansisland UsersWP – Front-end login form, User Registration, User Profile & Members Directory plugin for WP
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WordPress 插件 UsersWP 在 1.2.70 及更早版本中存在任意文件删除漏洞，该漏洞可通过 AJAX 处理程序触发。 当没有提供真实的 上传数据时，该插件会直接从 中获取账户“file”表单字段的值（ 调用 ，并将其结果与 的空输出进行合并）。在保存该值时，系统仅通过 进行检查，而该检查仅拒绝包含字面量 的字符串。 随后，当该值被 处理时，它先经过 验证，再通过 进行规范化处理。该辅助函数会对存储的 URL 执行全局 ，将上传基础 URL 替换掉，使得一个精心构造的、内嵌 令牌的 URL 在最后一次

CVSS 8.1 · High
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I. Basic Information for CVE-2026-19991

Vulnerability Information
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Vulnerability Title
UsersWP <= 1.2.70 - Authenticated (Subscriber+) Arbitrary File Deletion
Source: CVE Program / CVE List V5
Vulnerability Description
The UsersWP plugin for WordPress is vulnerable to Arbitrary File Deletion in versions up to, and including, 1.2.70 via the upload_file_remove() AJAX handler. The plugin stores the value of an account 'file' form field taken directly from $_POST when no real $_FILES upload is provided (process_account() calls uwp_validate_fields() and array_merges the result with the empty output of UsersWP_Files::validate_uploads()). At storage time the value is only checked with validate_file(), which passes any string that does not contain a literal '../'. When the value is later processed by upload_file_remove(), it is again gated with validate_file() and then normalized through uwp_get_file_relative_url(); that helper performs a global str_replace() of the uploads base URL against the stored URL, allowing a crafted URL containing embedded '..<uploads-baseurl>' tokens to collapse into '../../' traversal sequences after the last validation. The transformed value is then appended to the uploads base directory and passed to wp_delete_file() without any canonical containment check. This makes it possible for authenticated attackers, with Subscriber-level access and above, to delete arbitrary files on the affected site's server (including wp-config.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
stiofansisland UsersWP – Front-end login form, User Registration, User Profile & Members Directory plugin for WP 0 ~ 1.2.70 -

II. Public POCs for CVE-2026-19991

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III. Intelligence Information for CVE-2026-19991

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Patches & Fixes for CVE-2026-19991 (1)

Vendor Advisories for CVE-2026-19991 (1)

Vendor Pages for CVE-2026-19991 (1)

Other References for CVE-2026-19991 (1)

IV. Related Vulnerabilities

Same product: UsersWP – Front-end login form, User Registration, User Profile & Members Directory plugin for WP
Same vendor: stiofansisland
Same weakness: CWE-22

V. Comments for CVE-2026-19991

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