Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-115481— baserCMS: BcCustomContent file fields can be configured to allow executable file extensions such as php, leading to arbitrary PHP file upload

Quick assessment

Affected
baserproject basercms
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.

baserCMS 是一个网站开发框架。从版本 5.0.0-beta1 开始，到版本 5.3.2 和 5.4.2 之前的所有版本中， 方法会读取插件的 文件，以决定每个用户组可访问的权限。当该文件不存在时，系统会为每个非管理员组写入一条通配符允许规则： 为 ， 为 ， 为 。BcCustomContent 插件在任何版本中均未提供此文件。管理员安装该插件后，默认的 用户组即可在文档根目录下存储并执行任意 PHP 代码。该问题已在版本 5.3.2 和 5.4.2 中修复。

CVSS 8.5 · High
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-115481

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
baserCMS: BcCustomContent file fields can be configured to allow executable file extensions such as php, leading to arbitrary PHP file upload
Source: CVE Program / CVE List V5
Vulnerability Description
baserCMS is a website development framework. Starting in version 5.0.0-beta1 and prior to versions 5.3.2 and 5.4.2, `PermissionGroupsService::build()` reads a plugin's `config/permission.php` to decide what each user group may reach. When that file is absent it writes a wildcard allow rule instead: `url` `/baser/<prefix>/<plugin>/*`, `method` `*`, `auth` true, for every non-admin group. BcCustomContent has no such file in any release. After an administrator installs it, the default `operators` group can store and execute arbitrary PHP under the document root. Versions 5.3.2 and 5.4.2 patch the issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
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
baserproject basercms >= 5.0.0-beta1, < 5.3.2 -

II. Public POCs for CVE-2026-115481

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-115481

请登录查看更多情报信息。

Other References for CVE-2026-115481 (5)

Same Patch Batch · baserproject · 2026-10-23 · 8 CVEs total

CVE-2026-114621 8.8 HIGH baserCMS: SQL injection in the admin panel and admin API
CVE-2026-114622 7.2 HIGH baserCMS: Encoded path traversal bypass in the theme file API
CVE-2026-114624 7.2 HIGH baserCMS: PHP object injection via unguarded unserialize() in the widget-area entity
CVE-2026-115457 7.1 HIGH baserCMS: Unauthenticated Stored XSS via Shortcode Expansion in Blog Comments
CVE-2026-114623 6.5 MEDIUM baserCMS: Path traversal in the BcThemeFile admin screen allows file disclosure
CVE-2026-115479 5.3 MEDIUM baserCMS: Mail-form auto-replies accept multiple visitor-controlled recipients
CVE-2026-115480 5.3 MEDIUM baserCMS: Public Web API mail-form submission bypasses image CAPTCHA

IV. Related Vulnerabilities

Same product: basercms
Same vendor: baserproject
Same weakness: CWE-434

V. Comments for CVE-2026-115481

No comments yet

Leave a comment