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CVE-2026-30879— baserCMS: Cross-site scripting vulnerability in blog post

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baserCMS团队的一套企业级内容管理系统（CMS）。 baserCMS 5.2.3之前版本存在跨站脚本漏洞，该漏洞源于博客文章相关功能模块，容易受到跨站脚本攻击。

AI Predicted 6.1 Difficulty: Easy EPSS 0.23% · P14

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter
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I. Basic Information for CVE-2026-30879

Vulnerability Information
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Vulnerability Title
baserCMS: Cross-site scripting vulnerability in blog post
Source: CVE Program / CVE List V5
Vulnerability Description
baserCMS is a website development framework. Prior to version 5.2.3, baserCMS has a cross-site scripting vulnerability in blog posts. This issue has been patched in version 5.2.3.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
baserCMS 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
baserCMS是baserCMS团队的一套企业级内容管理系统（CMS）。 baserCMS 5.2.3之前版本存在跨站脚本漏洞，该漏洞源于博客文章相关功能模块，容易受到跨站脚本攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
baserproject basercms < 5.2.3 -

II. Public POCs for CVE-2026-30879

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-30879

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Vendor Advisories for CVE-2026-30879 (2)

Vendor Pages for CVE-2026-30879 (1)

Same Patch Batch · baserproject · 2026-03-31 · 9 CVEs total

CVE-2026-21861 9.1 CRITICAL baserCMS: OS Command Injection Leading to Remote Code Execution (RCE)
CVE-2026-30877 9.1 CRITICAL baserCMS: OS Command Injection in the baserCMS Update Functionality
CVE-2025-32957 8.7 HIGH baserCMS: unsafe File Upload Leading to Remote Code Execution (RCE)
CVE-2026-30940 7.2 HIGH baserCMS: Path Traversal in Theme File API Leads to Arbitrary File Write and RCE
CVE-2026-32734 7.1 HIGH baserCMS: Multiple vulnerabilities in baserCMS
CVE-2026-30878 5.3 MEDIUM baserCMS: Mail Form Acceptance Bypass via Public API
CVE-2026-27697 baserCMS: SQL injection vulnerability in blog post
CVE-2026-30880 baserCMS: OS command injection vulnerability in installer

IV. Related Vulnerabilities

Same product: basercms
Same vendor: baserproject
Same weakness: CWE-79

V. Comments for CVE-2026-30879

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