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CVE-2026-6909— Reflected XSS in ATutor

Quick assessment

Affected
ATutor ATutor
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.

ATutor是Atutor团队的一套开源的基于Web的学习内容管理系统（LCMS）。该系统包括教学内容管理、论坛、聊天室等模块。 ATutor 2.2.4版本存在跨站脚本漏洞，该漏洞源于/install/upgrade.php端点存在反射型跨站脚本漏洞，可能导致攻击者提供特制URL，在受害者浏览器中执行任意JavaScript代码。

AI Predicted 6.1 Difficulty: Easy EPSS 0.55% · P45

Affected Version Matrix 1

VendorProduct Version RangeStatus
ATutor ATutor 2.2.4 affected
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I. Basic Information for CVE-2026-6909

Vulnerability Information
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Vulnerability Title
Reflected XSS in ATutor
Source: CVE Program / CVE List V5
Vulnerability Description
ATutor is vulnerable to Reflected XSS in /install/upgrade.php endpoint. An attacker can provide a specially crafted URL that, when opened, results in arbitrary JavaScript execution in the victim's browser. Product is no longer actively supported. Maintainers of this project were notified early about this vulnerability, but did not respond with the details of the vulnerability or vulnerable version range. Only version 2.2.4 was tested and confirmed as vulnerable, other versions were not tested but might also be vulnerable.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/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
ATutor 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
ATutor是Atutor团队的一套开源的基于Web的学习内容管理系统（LCMS）。该系统包括教学内容管理、论坛、聊天室等模块。 ATutor 2.2.4版本存在跨站脚本漏洞，该漏洞源于/install/upgrade.php端点存在反射型跨站脚本漏洞，可能导致攻击者提供特制URL，在受害者浏览器中执行任意JavaScript代码。
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
ATutor ATutor 2.2.4 -

II. Public POCs for CVE-2026-6909

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III. Intelligence Information for CVE-2026-6909

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Security Blog Posts for CVE-2026-6909 (1)

IV. Related Vulnerabilities

Same product: ATutor
Same vendor: ATutor
Same weakness: CWE-79

V. Comments for CVE-2026-6909

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