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CVE-2026-105123— W (wcms) through 3.18.0 RCE and Arbitrary File Write via Media Upload API

Quick assessment

Affected
vincent-peugnet wcms
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.

W（vincent-peugnet/wcms）3.18.0 及更早版本中存在远程代码执行漏洞。该漏洞允许已认证的用户通过滥用未经验证的 POST /api/v0/media/upload/[:path] 路径中的路径参数，写入任意文件。攻击者可以上传由 Web 服务器执行的 .php 文件，利用编码的 ../ 序列写入媒体目录之外的文件，并通过 DELETE /api/v0/media/[:path] 接口删除任意文件。

CVSS 8.8 · High EPSS 0.52% · P42

Affected Version Matrix 1

VendorProduct Version RangeStatus
vincent-peugnet wcms ≤ 3.18.0 affected
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I. Basic Information for CVE-2026-105123

Vulnerability Information
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Vulnerability Title
W (wcms) through 3.18.0 RCE and Arbitrary File Write via Media Upload API
Source: CVE Program / CVE List V5
Vulnerability Description
W (vincent-peugnet/wcms) through 3.18.0 contains a remote code execution vulnerability that allows authenticated editors to write arbitrary files by abusing the unvalidated path in POST /api/v0/media/upload/[*:path]. Attackers can upload .php files executed by the web server, use encoded ../ sequences to write outside the media directory, and delete arbitrary files via DELETE /api/v0/media/[*:path].
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
危险类型文件的不加限制上传
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
vincent-peugnet wcms 0 ~ 3.18.0 -

II. Public POCs for CVE-2026-105123

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III. Intelligence Information for CVE-2026-105123

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Patches & Fixes for CVE-2026-105123 (1)

Proof of Concept for CVE-2026-105123 (1)

News Coverage for CVE-2026-105123 (1)

Other References for CVE-2026-105123 (2)

IV. Related Vulnerabilities

Same product: wcms
Same vendor: vincent-peugnet
Same weakness: CWE-434

V. Comments for CVE-2026-105123

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